Behavioral interventions to enhance adherence to hormone therapy in breast cancer survivors: a systematic literature review
Open accessAbstract
Adjuvant hormone therapy contributes to reductions in recurrence and mortality for women with hormone receptor-positive breast cancer. However, adherence to hormone therapy is suboptimal. This is the first systematic literature review examining interventions aimed at improving hormone therapy adherence. Researchers followed the PRISMA guidelines. PubMed-Medline, CINAHL, PsychInfo, Ovid-Medline, and EMBASE were searched for behavioral interventions that aimed to enhance adherence to adjuvant hormone therapy in breast cancer survivors. A total of 376 articles were screened for eligibility. Five articles met the study criteria. All interventions presented adherence outcomes after 1-year follow-up. None significantly enhanced adherence compared to the usual care in the primary analysis (odds ratios ranged from 1.03 to 2.06 for adherence and from 1.11 to 1.18 for persistence). All studies targeted patients, and only 3 studies included postmenopausal breast cancer patients. Three tested the same intervention consisting of educational materials. Only one was conducted in the United States. Only one reported participants' ethnicity. Overall, it was unclear whether the studies contained bias. The use of different terminology and operationalization of adherence made comparisons challenging. Interventions to improve adherence to adjuvant hormone therapy in US breast cancer populations that include survivors who are ethnically diverse, premenopausal, and receiving tamoxifen therapy are necessary to inform future interventions. Adoption of consistent adherence definitions/measurements will provide a clearer framework to consolidate aggregate findings. Given the limited efficacy of tested interventions, it is important to engage oncologists and researchers to develop approaches that target different components associated with hormone therapy adherence, such as doctor-patient communication or social support.
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Claims the paper makes
0 of 82 cited sources checked · 0 supported · 0 flagged
- Findingown data
80% (4/5) of papers included only patients taking aromatase inhibitors.
“80% (n=4) of papers included only breast cancer patients who were taking Aromatase Inhibitors (AIs) (three of them focused only on post-menopausal survivors).”
Quote in the paperNot a substantial claim - Findingown data
Three studies tested the same intervention consisting of educational materials.
“Three tested the same intervention consisting of educational materials.”
- Also stated in: § Studies · plain
“In relation to the interventions, three of the studies tested the German-based PACT study intervention but in different contexts.14, 24, 25”
Quote in the paperNot a substantial claim0 of 3 sources checked- cites [14] Font, 2012, Prescription refill, patient self-report and physician report in assessing adherence to oral endocrine therapy in early breast cancer patients: a retrospective cohort study in Catalonia, Spain, Br J Cancer source
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- cites [24] Osterberg, 2005, Adherence to medication, N Engl J Med source
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- cites [25] Cramer, 2008, Medication compliance and persistence: terminology and definitions, Value Health source
Not checked in the free run.
- Rests on an assumption: The PACT intervention tested in the three studies was sufficiently similar across contexts to be treated as the same intervention.
- Also stated in: § Studies · plain
- Findingown data
All interventions targeted patients.
“All targeted patients and three only included post-menopausal breast cancer patients.”
- Also stated in: § Studies · plain
“All interventions were targeted towards patients (100%; n=5).”
Quote in the paperNot a substantial claim - Also stated in: § Studies · plain
- Findingown data
Three studies included only postmenopausal breast cancer patients.
“All targeted patients and three only included post-menopausal breast cancer patients.”
- Also stated in: § Studies · plain
“80% (n=4) of papers included only breast cancer patients who were taking Aromatase Inhibitors (AIs) (three of them focused only on post-menopausal survivors).”
Quote in the paperNot a substantial claim - Also stated in: § Studies · plain
- Findingown data
Five articles met the eligibility criteria.
“Five articles met criteria.”
- Also stated in: § Studies · plain
“Five papers met the eligibility criteria (see Figure 1 for additional details).”
Quote in the paperSubstantial claim - Also stated in: § Studies · plain
- Findingown data
Three papers measured both adherence and persistence.
“Three papers (60%) measured adherence outcomes as both adherence and persistence.”
Quote in the paperNot a substantial claim - Findingown data
None of the included interventions significantly improved adherence or persistence compared with usual care in the primary analysis.
“None significantly enhanced adherence compared to the usual care in the primary analysis (OR ranged from 1.03 to 2.06 for adherence and from 1.11 – 1.18 for persistence).”
- Also stated in: § Studies · plain
“None of the studies yielded significant differences between the intervention and comparison arms in their primary analysis (see Tables 3 and 4).”
- Also stated in: § Discussion · plain
“None of the interventions significantly enhanced adherence outcomes in their primary analysis.”
Quote in the paperSubstantial claim- Rests on an assumption: The odds ratios calculated across studies with differing adherence definitions and measures are comparable enough to support the conclusion of no significant effect.
- Also stated in: § Studies · plain
- Findingown data
Only one study was conducted in the US.
“Only one was conducted in the US.”
- Also stated in: § Studies · plain
“Only one study was conducted in the US28 and it was the only one that reported participants' ethnicity.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [28] Partridge, 2003, Nonadherence to adjuvant tamoxifen therapy in women with primary breast cancer, J Clin Oncol source
Not checked in the free run.
- Also stated in: § Studies · plain
- Findingown data
All included interventions reported adherence outcomes after one year of follow-up.
“All interventions presented adherence outcomes after one-year follow-up.”
- Also stated in: § Studies · plain
“All interventions presented adherence follow-up at one year (n=5).”
Quote in the paperNot a substantial claim - Also stated in: § Studies · plain
- Findingcitation
Yu et al. found no significant difference in odds of adherence between intervention and usual care (OR 1.01; CI 0.42-2.43).
“The odds of adherence (OR: 1.01; CI: 0.42-2.43) were not significantly different in the intervention (n=241) and usual care (n=262) groups.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [25] Cramer, 2008, Medication compliance and persistence: terminology and definitions, Value Health source
Not checked in the free run.
- Rests on an assumption: The PACT intervention tested in the three studies was sufficiently similar across contexts to be treated as the same intervention.
- Rests on an assumption: The odds ratios calculated across studies with differing adherence definitions and measures are comparable enough to support the conclusion of no significant effect.
- Findingcitation
Studies testing interventions on adjuvant hormonal therapy side effects did not focus on or measure adherence to treatment.
“We retrieved several studies that tested the impact of interventions (e.g., acupuncture, exercise) on adjuvant hormonal therapy related side effects but they did not focus or measure adherence to the treatment.43-45”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [43] Duijts, 2012, Efficacy of cognitive behavioral therapy and physical exercise in alleviating treatment-induced menopausal symptoms in patients with breast cancer: results of a randomized, controlled, multicenter trial, J Clin Oncol source
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- cites [44] Galantino, 2013, Tai chi for well-being of breast cancer survivors with aromatase inhibitor–associated arthralgias: a feasibility study, Altern Ther Health Med
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- cites [45] DiMatteo, 2004, Variations in patients’ adherence to medical recommendations: a quantitative review of 50 years of research, Med Care source
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- Findingcitation
All studies were randomized except Yu and colleagues'.
“All the studies were randomized except for Yu and colleagues'.25”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [25] Cramer, 2008, Medication compliance and persistence: terminology and definitions, Value Health source
Not checked in the free run.
- Findingcitation
Only one study included survivors taking tamoxifen.
“Only one study included survivors taking tamoxifen.28”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [28] Partridge, 2003, Nonadherence to adjuvant tamoxifen therapy in women with primary breast cancer, J Clin Oncol source
Not checked in the free run.
- Findingown data
80% (4/5) of papers were randomized controlled trials.
“80% (n=4) of the papers consisted of randomized controlled trials (RCT; n=4), all included an educational component (100%; n=5), and 60% incorporated reminders (n=3).”
Quote in the paperNot a substantial claim - Findingown data
All interventions included an educational component.
“80% (n=4) of the papers consisted of randomized controlled trials (RCT; n=4), all included an educational component (100%; n=5), and 60% incorporated reminders (n=3).”
Quote in the paperNot a substantial claim - Findingown data
Most studies presented only one-year follow-up results.
“Most studies only presented one-year follow-up results.”
Quote in the paperSubstantial claim - Findingown data
None of the retrieved interventions had an explicit focus on side effects.
“While hormonal treatment related side effects such as hot flashes and osteoporosis42 represent one of the main reasons for discontinuation,6 none of the retrieved interventions had an explicit focus on side effects.”
Quote in the paperSubstantial claim - Findingcitation
The target population in three studies was postmenopausal breast cancer patients taking aromatase inhibitors.
“In relation to the characteristics of the samples included in the studies, the target population in three of the studies was post-menopausal breast cancer patients taking AIs.14, 24, 25”
Quote in the paperNot a substantial claim0 of 3 sources checked- cites [14] Font, 2012, Prescription refill, patient self-report and physician report in assessing adherence to oral endocrine therapy in early breast cancer patients: a retrospective cohort study in Catalonia, Spain, Br J Cancer source
Not checked in the free run.
- cites [24] Osterberg, 2005, Adherence to medication, N Engl J Med source
Not checked in the free run.
- cites [25] Cramer, 2008, Medication compliance and persistence: terminology and definitions, Value Health source
Not checked in the free run.
- Findingcitation
Persistence was measured in many different ways, including self-report, documented prescription of 365 tablets, or average months from initiation to discontinuation.
“Persistence was measured in a plethora of different ways including self-report (i.e., still taking the medication-yes vs.no),24 documented prescription of 365 tablets,14 or average number of months from initiation to discontinuation.26”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [24] Osterberg, 2005, Adherence to medication, N Engl J Med source
Not checked in the free run.
- cites [14] Font, 2012, Prescription refill, patient self-report and physician report in assessing adherence to oral endocrine therapy in early breast cancer patients: a retrospective cohort study in Catalonia, Spain, Br J Cancer source
Not checked in the free run.
- cites [26] Ruddy, 2009, Patient adherence and persistence with oral anticancer treatment, CA Cancer J Clin
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- Findingcitation
Only 40% (2/5) of interventions were theory driven.
“Only 40% of the interventions (n=2) presented were theory driven.26, 28”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [26] Ruddy, 2009, Patient adherence and persistence with oral anticancer treatment, CA Cancer J Clin
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- cites [28] Partridge, 2003, Nonadherence to adjuvant tamoxifen therapy in women with primary breast cancer, J Clin Oncol source
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- Findingcitation
Doctor-patient communication around adjuvant hormonal therapy remains an unexplored intervention target.
“Good communication between doctors and patients is associated with higher adherence to hormonal therapy,29 but this remains an unexplored intervention target.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [29] Kripalani, 2007, Interventions to enhance medication adherence in chronic medical conditions: a systematic review, Arch Intern Med source
Not checked in the free run.
- Findingown data
60% (3/5) of interventions incorporated reminders.
“80% (n=4) of the papers consisted of randomized controlled trials (RCT; n=4), all included an educational component (100%; n=5), and 60% incorporated reminders (n=3).”
Quote in the paperNot a substantial claim - Findingown data
In COMPAS post-hoc pooled analysis, intervention groups had significantly higher adherence rates (62.7% telephone, 64.7% letter) than control (48%; p=.039).
“Although no significant differences were found in the primary analysis, post-hoc pooled analysis suggested that the intervention groups had significantly higher rates of adherence (62.7% telephone, 64.7% letter) than the control group (48%; p=.039).”
Quote in the paperNot a substantial claim- Rests on an assumption: The odds ratios calculated across studies with differing adherence definitions and measures are comparable enough to support the conclusion of no significant effect.
- Findingnone given
None of the studies conducted outside the US provided information about patients' race or ethnicity.
“None of the studies conducted outside the US provided information about patients' race or ethnicity.”
Quote in the paperSubstantial claim - Findingcitation
Ell and colleagues' intervention focused predominantly on Latina breast cancer survivors in a public safety net medical center in the US.
“Notably, Ell and colleagues' intervention focused predominantly on Latina breast cancer survivors in a public safety net medical center in the US.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [28] Partridge, 2003, Nonadherence to adjuvant tamoxifen therapy in women with primary breast cancer, J Clin Oncol source
Not checked in the free run.
- Findingown data
New technology for reminders was unexplored in the retrieved studies.
“This aspect was unexplored in the retrieved studies.”
Quote in the paperSubstantial claim - Premisecitation
Adjuvant hormonal therapy reduces recurrence and mortality in women with hormone receptor-positive breast cancer.
“Adjuvant hormonal therapy contributes to reductions in recurrence and mortality for women with hormone receptor positive breast cancer.”
- Also stated in: § Introduction · plain
“Adjuvant hormonal therapy, through selective ER modulators (e.g., tamoxifen) and/or aromatase inhibitors (e.g., anastrozole), has contributed to significant reductions in recurrence and mortality in women with this diagnosis.4, 5”
Quote in the paperSubstantial claim - Also stated in: § Introduction · plain
- Interpretationreasoning
The use of different terminology and operationalization of adherence made comparisons challenging.
“The use of different terminology and operationalization of adherence made comparisons challenging.”
- Also stated in: § Discussion · plain
“The lack of consistency in the terms, definitions, and operationalization of adherence and persistence made comparisons challenging.”
Quote in the paperSubstantial claim - Also stated in: § Discussion · plain
- Premisecitation
There is no gold standard for measuring adherence because of accuracy limitations of assessment methods.
“Due to the accuracy limitations of the methods to assess adherence (e.g., self-report, pill counts, pharmacy records, medical records, electronic medication caps),11 there is no gold standard for measuring adherence.12-14”
Quote in the paperSubstantial claim0 of 4 sources checked- cites [11] Chlebowski, 2006, Adherence to endocrine therapy for breast cancer, Oncology source
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- cites [12] Accordino, 2013, Disparities and challenges in adherence to oral antineoplastic agents, Am Soc Clin Oncol Educ Book source
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- cites [13] Hadji, 2013, The patient’s anastrozole compliance to therapy (PACT) program: a randomized, in-practice study on the impact of a standardized information program on persistence and compliance to adjuvant endocrine therapy in postmenopausal women with early breast cancer, Ann Onco source
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- cites [14] Font, 2012, Prescription refill, patient self-report and physician report in assessing adherence to oral endocrine therapy in early breast cancer patients: a retrospective cohort study in Catalonia, Spain, Br J Cancer source
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- Premisecitation
Adherence to adjuvant hormonal therapy is suboptimal.
“However, adherence to hormonal therapy is suboptimal.”
- Also stated in: § Introduction · plain
“Despite these benefits, between 31-73% of survivors discontinue adjuvant hormonal therapy in clinical practice,6 thereby reducing treatment efficacy.7-10”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [6] Murphy, 2012, Adherence to adjuvant hormonal therapy among breast cancer survivors in clinical practice: a systematic review, Breast Cancer Res Treat source
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- Also stated in: § Introduction · plain
- Premisecitation
Few interventions have been developed to improve adjuvant hormonal therapy adherence.
“However, few interventions have been developed to improve adjuvant hormonal therapy adherence.6”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [6] Murphy, 2012, Adherence to adjuvant hormonal therapy among breast cancer survivors in clinical practice: a systematic review, Breast Cancer Res Treat source
Not checked in the free run.
- Premisecitation
Between 31% and 73% of breast cancer survivors discontinue adjuvant hormonal therapy in clinical practice.
“Despite these benefits, between 31-73% of survivors discontinue adjuvant hormonal therapy in clinical practice,6 thereby reducing treatment efficacy.7-10”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [6] Murphy, 2012, Adherence to adjuvant hormonal therapy among breast cancer survivors in clinical practice: a systematic review, Breast Cancer Res Treat source
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- Premisecitation
Taking the full course of adjuvant hormonal therapy (daily for at least five years) is necessary to obtain its full benefits.
“Adherence to the full course of treatment (one pill every day for at least 5 years) is necessary to obtain the full benefits of hormonal treatment.4, 5”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [4] Davies, 2013, Long-term effects of continuing adjuvant tamoxifen to 10 years versus stopping at 5 years after diagnosis of oestrogen receptor–positive breast cancer: ATLAS, a randomised trial, Lancet source
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- cites [5] Hershman, 2011, Early discontinuation and non-adherence to adjuvant hormonal therapy are associated with increased mortality in women with breast cancer, Breast Cancer Res Treat source
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- Study design and conductown data
Overall, it was unclear whether the included studies contained bias.
“Overall it was unclear whether the studies contained bias.”
- Also stated in: § Bias Analysis · plain
“Overall it was unclear whether the studies contained bias as they did not provide sufficient information to assess risk of bias such as sequence generation, allocation concealment, or blinding (see Table 5).”
Quote in the paperNot a substantial claim - Also stated in: § Bias Analysis · plain
- Premisecitation
Other reviews found that about half of interventions significantly improved adherence in chronic conditions, medication prescriptions, and self-administered medications.
“The finding that none of the interventions were effective at increasing adherence is at odds with other literature reviews (not focusing on hormonal therapy) that found approximately half of interventions significantly enhanced adherence in the context of chronic conditions,30 medication prescriptions in general,31 and self-administered medications for chronic diseases.32”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [30] McDonald, 2002, Interventions to enhance patient adherence to medication prescriptions: scientific review, JAMA source
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- cites [31] Viswanathan, 2012, Interventions to improve adherence to self-administered medications for chronic diseases in the United States: a systematic review, Ann Intern Med source
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- cites [32] Ayres, 2014, Adherence and discontinuation of oral hormonal therapy in patients with hormone receptor positive breast cancer, Int J Clin Pharm source
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- Premisecitation
Studies have shown that adherence is problematic in both older and younger women similarly.
“Although studies have shown that adherence is problematic in both older and younger women similarly,6 the reasons for discontinuation or barriers to adherence may be different between the two groups.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [6] Murphy, 2012, Adherence to adjuvant hormonal therapy among breast cancer survivors in clinical practice: a systematic review, Breast Cancer Res Treat source
Not checked in the free run.
- Interpretationreasoning
Reasons for discontinuation or barriers to adherence may differ between older and younger women.
“Although studies have shown that adherence is problematic in both older and younger women similarly,6 the reasons for discontinuation or barriers to adherence may be different between the two groups.”
Quote in the paperSubstantial claim - Premisecitation
Adherence to hormonal therapy tends to decrease over time.
“Since adherence to hormonal therapy tends to decrease over time,33, 34 expanding the time frame of data collection may provide further insights about the long-term impact of the interventions.”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [33] Huiart, 2013, A meta-regression analysis of the available data on adherence to adjuvant hormonal therapy in breast cancer: summarizing the data for clinicians, Breast Cancer Res Treat source
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- cites [34] Nieuwlaat, 2014, Interventions for enhancing medication adherence, Cochrane Database Syst Rev
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- Premisecitation
Good communication between doctors and patients is associated with higher adherence to hormonal therapy.
“Good communication between doctors and patients is associated with higher adherence to hormonal therapy,29 but this remains an unexplored intervention target.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [29] Kripalani, 2007, Interventions to enhance medication adherence in chronic medical conditions: a systematic review, Arch Intern Med source
Not checked in the free run.
- Interpretationown data
Research on adjuvant hormonal therapy behavioral interventions in breast cancer patients has lagged behind in the US.
“The research on adjuvant hormonal therapy behavioral interventions in breast cancer patients has lagged behind in the US.”
Quote in the paperSubstantial claim - Premisecitation
Some research suggests that minority groups have lower adjuvant hormonal therapy adherence.
“Although there is mixed evidence,39, 40 some research suggests that minority groups have lower adjuvant hormonal therapy adherence.8, 10, 29”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [8] Kimmick, 2009, Adjuvant hormonal therapy use among insured, low-income women with breast cancer, J Clin Oncol source
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- cites [10] Farmer, 1999, Methods for measuring and monitoring medication regimen adherence in clinical trials and clinical practice, Clin Ther source
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- cites [29] Kripalani, 2007, Interventions to enhance medication adherence in chronic medical conditions: a systematic review, Arch Intern Med source
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- Premisecitation
Nieuwlaat and colleagues' review found that the most effective adherence interventions were more complex and multi-faceted, providing tailored, personal, continuous education, counseling, and daily support from health professionals and family.
“Nieuwlaat and colleagues' literature review (2014)35 found that the most effective adherence interventions were more complex and multi-faceted (e.g., delivering education materials via both peers and nurses) and provided tailored, personal, and continuous education, counseling, and daily treatment support from health professionals (e.g., pharmacists) and supplemental support from family.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [35] Bissonnette, 2008, Adherence: a concept analysis, J Adv Nurs source
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- Interpretationreasoning
Educational materials alone may not be sufficient to improve adherence outcomes.
“Although the PACT intervention can be easily scalable as it is not resource intensive (mailing materials), educational materials alone may not be sufficient in impacting adherence outcomes.”
Quote in the paperSubstantial claim- Rests on an assumption: The PACT intervention tested in the three studies was sufficiently similar across contexts to be treated as the same intervention.
- Premisecitation
Survivors who reported lack of understandable information, not being told about side effects in advance, limited opportunity to ask questions at diagnosis, and never being asked about difficulties taking adjuvant hormonal therapy had lower adherence rates.
“There is also evidence that survivors who reported (1) lack of understandable information about treatment, (2) not being told about side effects in advance, (3) having limited opportunity to ask questions at the time of diagnosis, and (4) never having been asked about the difficulties of taking adjuvant hormonal therapy, exhibited lower rates of adherence to hormonal treatment.16-18”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [16] Kahn, 2007, Patient centered experiences in breast cancer: predicting long-term adherence to tamoxifen use, Med Care source
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- cites [17] Neugut, 2012, Non-initiation of adjuvant hormonal therapy in women with hormone receptor–positive breast cancer: the Breast Cancer Quality of Care study (BQUAL), Breast Cancer Res Treat source
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- cites [18] Liberati, 2009, The PRISMA statement for reporting systematic reviews and meta-analyses of studies that evaluate health care interventions: explanation and elaboration, J Clin Epidemiol source
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- Premisecitation
Hormonal treatment-related side effects such as hot flashes and osteoporosis are one of the main reasons for discontinuation.
“While hormonal treatment related side effects such as hot flashes and osteoporosis42 represent one of the main reasons for discontinuation,6 none of the retrieved interventions had an explicit focus on side effects.”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [6] Murphy, 2012, Adherence to adjuvant hormonal therapy among breast cancer survivors in clinical practice: a systematic review, Breast Cancer Res Treat source
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- cites [42] Crew, 2007, Pilot study of acupuncture for the treatment of joint symptoms related to adjuvant aromatase inhibitor therapy in postmenopausal breast cancer patients, J Cancer Survivorship source
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- Premisecitation
A recent meta-analysis found that patients on tamoxifen had lower adherence rates compared to those taking aromatase inhibitors.
“A recent meta-analysis found that patients on tamoxifen had lower adherence rates compared to those taking AIs.34”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [34] Nieuwlaat, 2014, Interventions for enhancing medication adherence, Cochrane Database Syst Rev
Not checked in the free run.
- Premisecitation
Patient-centered communication and patients' perceived self-efficacy in interacting with doctors are associated with higher adherence to hormonal treatment.
“Conversely, patient-centered communication and patients' perceived self-efficacy in interacting with doctors has been associated with higher adherence to hormonal treatment.40”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [40] Davidson, 2007, Oncologist–patient discussion of adjuvant hormonal therapy in breast cancer: results of a linguistic study focusing on adherence and persistence to therapy, J Suppor
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- Premisecitation
Publication bias tends to occur when negative findings are not published.
“Since publication bias tends to occur when negative findings are not published,20 if there were unpublished papers, they would probably confirm the limited efficacy of the interventions to improve adjuvant hormonal therapy adherence rates.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [20] Ell, 2009, Cancer treatment adherence among low-income women with breast or gynecologic cancer: a randomized controlled trial of patient navigation, Cancer source
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- Study design and conductcitation
It is not possible to assure that all behavioral adjuvant hormonal therapy interventions were retrieved due to limitations of MeSH terms and publication bias.
“As in any systematic literature review, it is not possible to assure that all the behavioral adjuvant hormonal therapy interventions were retrieved due to the limitations of using MeSH terms and publication bias.19, 20”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [19] Moher, 2009, Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement, J Clin Epidemiol source
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- cites [20] Ell, 2009, Cancer treatment adherence among low-income women with breast or gynecologic cancer: a randomized controlled trial of patient navigation, Cancer source
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- Study design and conductnone given
Most information retrieved came from studies with unclear risk of bias.
“Most information retrieved came from studies that had an unclear risk of bias.”
Quote in the paperNot a substantial claim - Premisecitation
Use of new technology for reminders has been proven effective in improving adherence rates in other chronic conditions such as HIV or diabetes.
“Finally, the use of new technology (e.g., especially for reminders) has been proven to be effective in improving adherence rates in other chronic conditions such as HIV or diabetes.48, 49”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [48] Castano, 2013, Using digital technologies to improve treatment adherence, Clin Obstet Gynecol source
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- cites [49]
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- Study design and conductreasoning
Limited information on study methods limited the authors' ability to judge the probability of some potential biases.
“The limited information provided on some aspects of the study methods limited the authors' ability to judge the probability of some of the potential biases.”
Quote in the paperNot a substantial claim
- Classified as probably not a substantial claim. 14
- May combine two claims. 23
- The quote only partly states this claim. 1
Probably not a substantial claim: may not pass S3 (load-bearing).
Findingown dataOnly one study reported participants' ethnicity.
“Only one reported participants' ethnicity.”
- Also stated in: § Studies · plain
“Only one study was conducted in the US28 and it was the only one that reported participants' ethnicity.”
Quote in the paperNot a substantial claim- Also stated in: § Studies · plain
May combine two claims.
Findingown dataOne paper included patients taking either aromatase inhibitors or tamoxifen, and none were restricted to tamoxifen only.
“There was only one paper (20%) that included patients who were taking either AIs or tamoxifen and none of the studies were restricted to survivors taking tamoxifen only.”
Quote in the paperNot a substantial claimMay combine two claims.
Findingown dataThe odds ratios for adherence in primary analyses ranged from 1.03 to 2.06, and for persistence from 1.11 to 1.18.
“(OR ranged from 1.03 to 2.06 for adherence and from 1.11 – 1.18 for persistence).”
Quote in the paperSubstantial claim- Rests on an assumption: The odds ratios calculated across studies with differing adherence definitions and measures are comparable enough to support the conclusion of no significant effect.
May combine two claims.
FindingcitationAll interventions were patient-focused and included educational and reminder components.
“All the interventions were patient-focused (rather than physician-focused or patient-provider communication focused) and comprised of an educational and a reminder component.14, 24-26, 28”
Quote in the paperSubstantial claim0 of 5 sources checked- cites [14] Font, 2012, Prescription refill, patient self-report and physician report in assessing adherence to oral endocrine therapy in early breast cancer patients: a retrospective cohort study in Catalonia, Spain, Br J Cancer source
Not checked in the free run.
- cites [24] Osterberg, 2005, Adherence to medication, N Engl J Med source
Not checked in the free run.
- cites [25] Cramer, 2008, Medication compliance and persistence: terminology and definitions, Value Health source
Not checked in the free run.
- cites [26] Ruddy, 2009, Patient adherence and persistence with oral anticancer treatment, CA Cancer J Clin
Not checked in the free run.
- cites [28] Partridge, 2003, Nonadherence to adjuvant tamoxifen therapy in women with primary breast cancer, J Clin Oncol source
Not checked in the free run.
May combine two claims.
FindingcitationZiller and colleagues' intervention was the only one with higher odds of enhancing adherence and found a difference between intervention arms and usual care in pooled analysis.
“Echoing this, Ziller and colleagues' (2013)26 intervention, which included personalized motivational letters and motivational interviewing calls, was the only one with higher odds of enhancing adherence and that found a difference between the two intervention arms and the usual care arm in the pooled analysis.26”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [26] Ruddy, 2009, Patient adherence and persistence with oral anticancer treatment, CA Cancer J Clin
Not checked in the free run.
May combine two claims.
Findingnone givenAdherence rates were generally high at year one in most studies, ranging from 81% to 96%, except in Ziller and colleagues' study.
“Adherence rates were generally high at year one in most studies, except in Ziller and colleagues', ranging from 81% to 96%.”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataAdherence was measured by self-report in one paper, pharmacy records in two, and a combination in two.
“Adherence was measured by self-report in one paper (20%), by pharmacy records in two papers (40%), or by a combination of both in two papers (40%).”
Quote in the paperNot a substantial claimMay combine two claims.
FindingcitationIn IMPAACT, among 44 patients who obtained tamoxifen or anastrozole, 59% were adherent and there was no significant difference in hormonal therapy adherence between arms.
“From the 44 patients that obtained tamoxifen or anastrozole, 59% were adherent and there was no significant difference in hormonal therapy adherence between the two arms.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [28] Partridge, 2003, Nonadherence to adjuvant tamoxifen therapy in women with primary breast cancer, J Clin Oncol source
Not checked in the free run.
- Rests on an assumption: The odds ratios calculated across studies with differing adherence definitions and measures are comparable enough to support the conclusion of no significant effect.
May combine two claims.
Findingown dataIn CARIATIDE, the intervention had a significantly positive effect on overall adherence in Sweden/Finland (p=0.02) and a significantly negative effect in Austria/Switzerland (p=0.03).
“However, there were some significant differences in specific countries, as intervention had a significantly positive impact on overall adherence in Sweden/Finland (p=0.02) and a significantly negative impact in Austria/Switzerland (p=0.03).”
Quote in the paperNot a substantial claim- Rests on an assumption: The odds ratios calculated across studies with differing adherence definitions and measures are comparable enough to support the conclusion of no significant effect.
May combine two claims.
FindingcitationThe PACT study found no statistical differences between intervention and usual care in adherence (OR 1.03; CI 0.81-1.30) or persistence (OR 1.11; CI 0.95-1.29).
“The primary endpoint analysis with 2,740 participants (usual care n=1,339; intervention n= 1,401) found no statistical differences between the intervention and usual care arms in adherence (OR: 1.03; CI: 0.81 – 1.30) and persistence (OR: 1.11; CI: 0.95 – 1.29).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [14] Font, 2012, Prescription refill, patient self-report and physician report in assessing adherence to oral endocrine therapy in early breast cancer patients: a retrospective cohort study in Catalonia, Spain, Br J Cancer source
Not checked in the free run.
- Rests on an assumption: The PACT intervention tested in the three studies was sufficiently similar across contexts to be treated as the same intervention.
- Rests on an assumption: The odds ratios calculated across studies with differing adherence definitions and measures are comparable enough to support the conclusion of no significant effect.
Probably not a substantial claim: may not pass S3 (load-bearing).
FindingcitationSome studies used the term 'compliance' instead of 'adherence'.
“For instance, some studies used the term “compliance” instead of “adherence,”14, 24, 25 which is currently favored due to the paternalistic connotations associated with the term compliance.36”
Quote in the paperNot a substantial claim0 of 3 sources checked- cites [14] Font, 2012, Prescription refill, patient self-report and physician report in assessing adherence to oral endocrine therapy in early breast cancer patients: a retrospective cohort study in Catalonia, Spain, Br J Cancer source
Not checked in the free run.
- cites [24] Osterberg, 2005, Adherence to medication, N Engl J Med source
Not checked in the free run.
- cites [25] Cramer, 2008, Medication compliance and persistence: terminology and definitions, Value Health source
Not checked in the free run.
May combine two claims.
FindingcitationThe CARIATIDE study found no significant differences in adherence (OR 1.07; CI 0.89-1.30) or persistence (OR 1.18; CI 0.95-1.46) between intervention and usual care.
“Findings from the final endpoint analyses (n=2,543) showed no significant differences in the odds of adherence (OR: 1.07; CI: 0.89 – 1.30) and persistence (OR: 1.18; CI: 0.95 – 1.46) between participants randomized to the intervention (n=1,268) and usual care arms (n=1,275).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [24] Osterberg, 2005, Adherence to medication, N Engl J Med source
Not checked in the free run.
- Rests on an assumption: The PACT intervention tested in the three studies was sufficiently similar across contexts to be treated as the same intervention.
- Rests on an assumption: The odds ratios calculated across studies with differing adherence definitions and measures are comparable enough to support the conclusion of no significant effect.
May combine two claims.
FindingcitationCOMPAS found no significant differences between phone and usual care (OR 1.90; CI 0.90-4.03) or between letter and usual care (OR 2.06; CI 0.97-4.36) in primary analysis.
“The primary analysis (n=171) found no statistically significant differences between the phone group and the usual care arms (OR 1.90; CI: 0.90-4.03) and between the letter group and usual care arms (OR: 2.06; CI: 0.97-4.36).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [26] Ruddy, 2009, Patient adherence and persistence with oral anticancer treatment, CA Cancer J Clin
Not checked in the free run.
- Rests on an assumption: The odds ratios calculated across studies with differing adherence definitions and measures are comparable enough to support the conclusion of no significant effect.
Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
Findingown dataPersistence was measured by case report forms in one paper, pharmacy records in one, and a combination in one.
“Persistence was measured by case report forms (20%; n=1), pharmacy records (20%; n=1), or by a combination of both (20%; n=1).”
Quote in the paperNot a substantial claimClassified as probably not a substantial claim.
Study design and conductown dataOdds ratios and 95% CIs comparing adherence and persistence between intervention and usual care were calculated from study results.
“Odds ratios (OR) and its 95% CI comparing adherence and persistence with adjuvant hormonal therapy in the intervention compared to the usual care group were also calculated from study results and are presented in Tables 3 and 4.”
Quote in the paperSubstantial claimProbably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
Study design and conductown dataTwo authors independently abstracted data, with additional reviewers resolving discrepancies.
“AH and MC independently abstracted the data and two additional reviewers (CD and VS) resolved any discrepancies in data extraction.”
Quote in the paperNot a substantial claimClassified as probably not a substantial claim.
Study design and conductnone givenOnly the primary adherence outcome was considered when multiple outcomes were reported.
“In papers that had multiple adherence outcomes reported, only the primary outcome was considered for this review.”
Quote in the paperSubstantial claimProbably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
Study design and conductown dataRisk of bias was assessed with the Cochrane Collaboration's tool across six domains, independently by two authors.
“Studies were assessed for risk of bias using the Cochrane Collaboration's tool27 that includes six potential biases: sequence generation; allocation concealment; blinding of participants, personnel, and outcome assessors; incomplete outcome data; selective outcome reporting; and other.”
- Also stated in: § Risk of Bias Assessment · plain
“Two authors (AH and MC) independently reviewed each bias and categorized them as “Yes,” “No,” or “Unclear”.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [27] Higgins, 2011, The Cochrane Collaboration’s tool for assessing risk of bias in randomised trials, BMJ source
Not checked in the free run.
- Also stated in: § Risk of Bias Assessment · plain
Probably not a substantial claim: may not pass S3 (load-bearing).
Study design and conductown dataThe review searched PubMed-Medline, CINAHL, PsychInfo, Ovid-Medline, and EMBASE.
“On October 9, 2014 two authors (AH, MC) searched PubMed-Medline, CINAHL, PsychInfo, Ovid-Medline, and EMBASE using the following key terms:”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing).
Study design and conductown dataThe review followed PRISMA guidelines.
“Researchers followed the PRISMA guidelines.”
- Also stated in: § Search Strategy · plain
“The Preferred Reporting Items for Systematic Literature Reviews and Meta-Analysis (PRISMA)19, 20 was followed to conduct a systematic literature review about interventions to enhance adjuvant hormonal therapy adherence in breast cancer survivors.”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [19] Moher, 2009, Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement, J Clin Epidemiol source
Not checked in the free run.
- cites [20] Ell, 2009, Cancer treatment adherence among low-income women with breast or gynecologic cancer: a randomized controlled trial of patient navigation, Cancer source
Not checked in the free run.
- Also stated in: § Search Strategy · plain
Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
Study design and conductown dataTwo authors independently reviewed full texts of potentially eligible articles, with consensus and third-author resolution.
“Then the full text of all articles categorized as “Maybe” and “Yes” were independently reviewed by AH and MC. Consensus was reached through discussion, and a third author (VS), was consulted to resolve any disagreements on article status (see Figure 1).”
Quote in the paperNot a substantial claimMay combine two claims.
PremisecitationPatient variables, social support, patient-provider communication, and healthcare factors such as cost are associated with adherence to systemic therapies in breast cancer survivors.
“Patient variables (e.g., age), social support, patient-provider communication, and healthcare factors (e.g., cost) have been associated with breast cancer survivor adherence to systemic therapies.6, 16-18”
Quote in the paperNot a substantial claim0 of 4 sources checked- cites [6] Murphy, 2012, Adherence to adjuvant hormonal therapy among breast cancer survivors in clinical practice: a systematic review, Breast Cancer Res Treat source
Not checked in the free run.
- cites [16] Kahn, 2007, Patient centered experiences in breast cancer: predicting long-term adherence to tamoxifen use, Med Care source
Not checked in the free run.
- cites [17] Neugut, 2012, Non-initiation of adjuvant hormonal therapy in women with hormone receptor–positive breast cancer: the Breast Cancer Quality of Care study (BQUAL), Breast Cancer Res Treat source
Not checked in the free run.
- cites [18] Liberati, 2009, The PRISMA statement for reporting systematic reviews and meta-analyses of studies that evaluate health care interventions: explanation and elaboration, J Clin Epidemiol source
Not checked in the free run.
May combine two claims.
PremisecitationPublished adherence rates probably underestimate true adherence because doctors and patients overestimate adherence.
“Moreover, given the challenges in measuring adherence behaviors11 and overestimation of adherence by doctors and patients, published rates are probably an underestimation of the true adherence rates.15”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [15] Cluze, 2012, Adjuvant endocrine therapy with tamoxifen in young women with breast cancer: determinants of interruptions vary over time, Ann Oncol source
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
Study design and conductown dataTwo authors independently screened titles and abstracts, with consensus and third-author resolution.
“In the first round of reviews, two authors (AH and MC) independently reviewed all the papers' titles and abstracts to check eligibility and categorized the papers as “Yes,” “No,” or “Maybe,” based on whether they met the inclusion criteria.”
- Also stated in: § Inclusion and Exclusion Criteria · plain
“Consensus was reached through discussion, and a third author (VS), was consulted to resolve any disagreements on article status (see Figure 1).”
Quote in the paperNot a substantial claim- Also stated in: § Inclusion and Exclusion Criteria · plain
May combine two claims.
Study design and conductown dataOnly Ziller and colleagues explicitly mentioned blinding of study staff, with no details on how blinding was achieved or whether participants were blinded.
“Only one study, by Ziller and colleagues,26 explicitly mentioned blinding of the study staff (interviewers and analysts) although no details were presented regarding how blinding was achieved or whether participants were blinded (see Table 2A, only available as an online appendix, for more specific details about the bias analysis).”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [26] Ruddy, 2009, Patient adherence and persistence with oral anticancer treatment, CA Cancer J Clin
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationSome ethnic groups have the worst breast cancer mortality and morbidity outcomes.
“Moreover, since some ethnic groups have the worst breast cancer mortality and morbidity outcomes,1 it is key to assure that interventions include diverse populations.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [1] Siegel, 2014, Cancer statistics, 2014, CA Cancer J Clin
Not checked in the free run.
May combine two claims.
PremisecitationFrailty tends to be a concern in older women, while fertility issues uniquely impact younger premenopausal survivors.
“Frailty tends to be a concern in older women37 while fertility issues uniquely impact younger premenopausal survivors.38”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [37] Howard-Anderson, 2012, Quality of life, fertility concerns, and behavioral health outcomes in younger breast cancer survivors: a systematic review, J Natl Cancer Inst source
Not checked in the free run.
- cites [38] Livaudais, 2012, Racial/ethnic differences in initiation of adjuvant hormonal therapy among women with hormone receptor–positive breast cancer, Breast Cancer Res Treat source
Not checked in the free run.
May combine two claims.
PremisecitationAn observational linguistic study found that doctors tend to give monologues with general information about adjuvant hormonal therapy and do not spend enough time discussing potential barriers and treatment impact with patients.
“An observational linguistic study that analyzed doctor-patient communication around adjuvant hormonal therapy found that doctors tend to do monologues providing general information about adjuvant hormonal therapy, but do not spend enough time discussing with the patient about potential barriers and how the treatment may particularly impact them.41”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [41] Cella, 2008, Recognition and management of treatment-related side effects for breast cancer patients receiving adjuvant endocrine therapy, Breast Cancer Res Treat source
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
Study design and conductnone givenThe authors included five search engines and adapted the search strategy for each.
“However, the authors included five search engines and adapted the search strategy as necessary for each one.”
Quote in the paperNot a substantial claimMay combine two claims.
PremisecitationSocial support is associated with higher adherence in a meta-analysis with various medical conditions and in several adjuvant hormonal therapy studies with breast cancer survivors.
“Social support has also been associated with higher adherence in a meta-analysis with various medical conditions46 and in several adjuvant hormonal therapy studies with breast cancer survivors.16, 17, 47”
Quote in the paperSubstantial claim0 of 4 sources checked- cites [16] Kahn, 2007, Patient centered experiences in breast cancer: predicting long-term adherence to tamoxifen use, Med Care source
Not checked in the free run.
- cites [17] Neugut, 2012, Non-initiation of adjuvant hormonal therapy in women with hormone receptor–positive breast cancer: the Breast Cancer Quality of Care study (BQUAL), Breast Cancer Res Treat source
Not checked in the free run.
- cites [46] Huiart, 2012, Early discontinuation of tamoxifen intake in younger women with breast cancer: is it time to rethink the way it is prescribed?, Eur J Cancer source
Not checked in the free run.
- cites [47] Misono, 2010, Healthcare information technology interventions to improve cardiovascular and diabetes medication adherence, Am J Manag Care
Not checked in the free run.
The quote only partly states this claim.
InterpretationreasoningIf there were unpublished papers, they would probably confirm the limited efficacy of interventions to improve adherence.
“if there were unpublished papers, they would probably confirm the limited efficacy of the interventions to improve adjuvant hormonal therapy adherence rates.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S3 (load-bearing).
InterpretationreasoningCaution must be used in extrapolating these findings to other diseases or treatments.
“Furthermore, since this review focused solely on studies regarding adjuvant hormonal therapy, caution must be used in extrapolating these findings to other types of diseases or treatments.”
Quote in the paperNot a substantial claim
The paper relies on this without support.
The PACT intervention tested in the three studies was sufficiently similar across contexts to be treated as the same intervention.
“In relation to the interventions, three of the studies tested the German-based PACT study intervention but in different contexts.14, 24, 25”
“Although the materials were translated, there is limited information about the type of adaptation conducted and the extent of how divergent the material became from the original PACT form.”
The paper relies on this without support.
The odds ratios calculated across studies with differing adherence definitions and measures are comparable enough to support the conclusion of no significant effect.
“Odds ratios (OR) and its 95% CI comparing adherence and persistence with adjuvant hormonal therapy in the intervention compared to the usual care group were also calculated from study results and are presented in Tables 3 and 4.”
“The use of different terminology and operationalization of adherence made comparisons challenging.”
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
Among adequately powered trials of AET interventions, there are few positive findings.
“Among adequately powered trials of AET interventions, there are few positive findings.18–20”
From Refining and optimising a behavioural intervention to support endocrine therapy adherence (ROSETA) in UK women with breast cancer: Protocol for a pilot fractional factorial trial (2023) · cites this paper as [18]
The Results (Studies; page unavailable) report that none of the five interventions showed a significant difference between intervention and comparison arms in its primary analysis. The Results (Adherence Interventions Summary; page unavailable) also report null primary-endpoint findings for two large trials. The review does not establish which trials were adequately powered, so that qualification is not supported by our copy. (LLM, conf=0.83)
Experimental — accuracy not yet measuredAdherence interventions evaluated so far largely focused on educating patients regarding AET and did not consistently address the range of psychological factors that contribute to non-adherence.
“The interventions largely focussed on educating patients regarding AET and did not consistently address the range psychological factors that contribute to non-adherence.”
From Acceptance and Commitment Therapy to support medication decision-making and quality of life in women with breast cancer: protocol for a pilot randomised controlled trial (2022) · cites this paper as [23]
The Discussion (page unavailable) says all five interventions included educational materials and that their strategies combined education with reminders. The Conclusion (page unavailable) calls for interventions targeting other adherence-related components, including doctor–patient communication and social support. This supports the broad point that the interventions had a narrow focus, but the paper does not specifically characterize the omitted range as psychological factors. (LLM, conf=0.84)
Experimental — accuracy not yet measuredExisting interventions for supporting adherence to AET are mostly ineffective.
“Existing interventions for supporting adherence to AET are mostly ineffective. 3,10-12”
Previous adherence interventions focused on educating women to enhance adherence have proved minimally effective.
“Previous interventions focused on educating women to enhance adherence have proved minimally effective.”
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
Each contradiction between two passages listed here was confirmed by an independent check.
Reminder components are attributed to all interventions
MinorThe results say three of five interventions incorporated reminders, while the discussion says all interventions had a reminder component.
“60% incorporated reminders (n=3).”
“All the interventions were patient-focused (rather than physician-focused or patient-provider communication focused) and comprised of an educational and a reminder component.14, 24-26, 28”
Reported adherence odds-ratio range omits a study
MinorThe abstract gives 1.03 as the lowest adherence odds ratio, but the Yu study is reported with an adherence odds ratio of 1.01.
“OR ranged from 1.03 to 2.06 for adherence”
“The odds of adherence (OR: 1.01; CI: 0.42-2.43) were not significantly different in the intervention (n=241) and usual care (n=262) groups.”
Direction of adherence-rate bias is reversed
MinorThe introduction cites overestimation of adherence by doctors and patients, then says published adherence rates probably underestimate true adherence. The stated reason points in the opposite direction.
“published rates are probably an underestimation of the true adherence rates.15”
“overestimation of adherence by doctors and patients”
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A systematic review of interventions to improve adherence to endocrine therapy
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- Authors
- Hurtado-de-Mendoza, A., Cabling, M. L., Lobo, T., Dash, C., & Sheppard, V. B.
- Affiliations
- Georgetown University Medical Center (US)
- Corresponding author
- Cabling, Mark L.
- Venue
- Clinical Breast Cancer
- Publisher
- Elsevier BV
- Published
- 2016-08
- Volume
- 16
- Issue
- 4
- Pages
- 247-255.e3
- ISSN
- 1526-8209 (ISSN-L)
- PMC
- PMC4969158
- OpenAlex
- W2329997086
- Cited by
- 79
- References
- 56
- Citations by year
- 2026: 6 · 2025: 7 · 2024: 5 · 2023: 17 · 2022: 17 · 2021: 7 · 2020: 4 · 2019: 6 · 2018: 7 · 2017: 3
- FWCI
- 0.92
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Clinical Breast Cancer (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Cancer Institute (R01CA154848, K07CA197112)
- Topics
- Health Sciences › Medicine › Family Practice › Medication Adherence and Compliance
- Health Sciences › Medicine › Oncology › Cancer survivorship and care
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Women's cancer prevention and management
- Keywords
- breast cancer survivors, behavioral interventions, adjuvant endocrine therapy, tamoxifen, hormone receptor-positive breast cancer, treatment persistence, teaching materials, physician-patient communication, social support
- MeSH terms
- Behavior Therapy, Breast Neoplasms, Clinical Trials as Topic, Female, Humans, Physician-Patient Relations, Social Support, Tamoxifen, Chemotherapy, Adjuvant, Premenopause, Postmenopause, Survivors, Antineoplastic Agents, Hormonal, Medication Adherence
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-09-28.
Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-09-28.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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