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Mortality risk during and after opioid substitution treatment: systematic review and meta-analysis of cohort studies.
Open accessAbstract
Objective To compare the risk for all cause and overdose mortality in people with opioid dependence during and after substitution treatment with methadone or buprenorphine and to characterise trends in risk of mortality after initiation and cessation of treatment. Design Systematic review and meta-analysis. Data sources Medline, Embase, PsycINFO, and LILACS to September 2016. Study selection Prospective or retrospective cohort studies in people with opioid dependence that reported deaths from all causes or overdose during follow-up periods in and out of opioid substitution treatment with methadone or buprenorphine. Data extraction and synthesis Two independent reviewers performed data extraction and assessed study quality. Mortality rates in and out of treatment were jointly combined across methadone or buprenorphine cohorts by using multivariate random effects meta-analysis. Results There were 19 eligible cohorts, following 122 885 people treated with methadone over 1.3-13.9 years and 15 831 people treated with buprenorphine over 1.1-4.5 years. Pooled all cause mortality rates were 11.3 and 36.1 per 1000 person years in and out of methadone treatment (unadjusted out-to-in rate ratio 3.20, 95% confidence interval 2.65 to 3.86) and reduced to 4.3 and 9.5 in and out of buprenorphine treatment (2.20, 1.34 to 3.61). In pooled trend analysis, all cause mortality dropped sharply over the first four weeks of methadone treatment and decreased gradually two weeks after leaving treatment. All cause mortality remained stable during induction and remaining time on buprenorphine treatment. Overdose mortality evolved similarly, with pooled overdose mortality rates of 2.6 and 12.7 per 1000 person years in and out of methadone treatment (unadjusted out-to-in rate ratio 4.80, 2.90 to 7.96) and 1.4 and 4.6 in and out of buprenorphine treatment. Conclusions Retention in methadone and buprenorphine treatment is associated with substantial reductions in the risk for all cause and overdose mortality in people dependent on opioids. The induction phase onto methadone treatment and the time immediately after leaving treatment with both drugs are periods of particularly increased mortality risk, which should be dealt with by both public health and clinical strategies to mitigate such risk. These findings are potentially important, but further research must be conducted to properly account for potential confounding and selection bias in comparisons of mortality risk between opioid substitution treatments, as well as throughout periods in and out of each treatment.
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“The monthly rate of overdose among individuals treated with transmucosal buprenorphine or extended-release buprenorphine is 2.72 per 1000 people.4,32”
From Economic Evaluation of Extended-Release Buprenorphine for Persons With Opioid Use Disorder (2023) · cites this paper as [4]
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“Evidence shows that medications for opioid use disorder (MOUD) are a tool that helps reduce opioid-related overdose mortality.2,3,4”
From Economic Evaluation of Extended-Release Buprenorphine for Persons With Opioid Use Disorder (2023) · cites this paper as [4]
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“Unfortunately, this is more often than not a missed opportunity; however, it is not due to a lack of efficacy of MOUD, which has demonstrated improved retention in treatment and a mortality benefit through a reduction in illicit opioid use and overdoses [3, 4].”
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“This is a conservative assumption given costs associated with higher rates of overdose and emergency room utilization among untreated POUD compared to those receiving OAT [37].”
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“26–28 Additional adverse outcomes during OAT may include non-fatal overdoses, accidents 29 or cardiac problems resulting from QT interval prolongation.”
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“Medication-assisted therapies (MAT) for OUD have been found to be safe, significantly reduce risk of overdose, increase treatment adherence, and decrease transmission of infectious disease (Voklow, Frieden, Hyde, & Cha, 2014; Sordo et al., 2017; Mattick, Breen, Kimber, & Davoli, 2009; Tsui, Evans & Lum, 2014; Metzger…”
BackgroundThylstrup, B., Seid, A. K., Tjagvad, C., & Hesse, M. (2019) · Drug and Alcohol Dependence · doi:10.1016/j.drugalcdep.2019.107714 · Cited by 28
Discharges “Against Medical Advice” in Patients With Opioid-related Hospitalizations
Santos, C. J., Shofer, F. S., Lowenstein, M., & Perrone, J. (2020) · Journal of Addiction Medicine · doi:10.1097/adm.0000000000000688 · Cited by 28
“methadone and buprenorphine – improve a number of outcomes including reductions in overdose and all-cause mortality, illicit drug use, and transmission of infectious disease (Mattick et al., 2009; Mattick et al., 2014; Volkow et al., 2014; Alderks, 2017; Sordo et al., 2017).”
BackgroundJones, N. R., Nielsen, S., Farrell, M., Ali, R. L., Gill, A., Larney, S., & Degenhardt, L. J. (2020) · Drug and Alcohol Dependence · doi:10.1016/j.drugalcdep.2020.108464 · Cited by 28
“The risk of death is halved while on OAT as compared to out-of-treatment (Degenhardt et al., 2019; Sordo et al., 2017), survival benefits increase with cumulative exposure to treatment (Kimber et al.”
BackgroundCallister, C., Lockhart, S., Holtrop, J. S., Hoover, K., & Calcaterra, S. L. (2021) · Substance Abuse · doi:10.1080/08897077.2021.1975873 · Cited by 28
Chaillon, A., Bharat, C., Stone, J., Jones, N., Degenhardt, L. J., Larney, S., Farrell, M., Vickerman, P. T., Hickman, M., Martin, N. K., et al. (2021) · Addiction · doi:10.1111/add.15736 · Cited by 28
Lambdin, B. H., Bluthenthal, R. N., Tookes, H. E., Wenger, L. D., Morris, T., LaKosky, P. A., & Kral, A. H. (2022) · Drug and Alcohol Dependence · doi:10.1016/j.drugalcdep.2022.109504 · Cited by 28
“Buprenorphine, a MOUD approved by the US Food and Drug Administration in 2002, has a strong evidence-base and has been shown to reduce opioid overdose mortality (US Department of Health and Human Services, 2020; Sordo et al., 2017).”
BackgroundBergman, B. G., Ashford, R. D., & Kelly, J. F. (2019) · Experimental and Clinical Psychopharmacology · doi:10.1037/pha0000325 · Cited by 28
“Opioid use disorder (OUD) agonist medications, such as methadone, and partial agonist medications, such as buprenorphine (typically prescribed in a formulation with naloxone that can be taken sublingually, marketed in the United States as Suboxone), reduce the likelihood of illicit opioid use and opioid-involved overd…”
BackgroundGlanz, J. M., Binswanger, I. A., Clarke, C. L., Nguyen, A. P., Ford, M. A., Ray, G. T., Xu, S., Hechter, R. C., Yarborough, B. J. H., Roblin, D. W., et al. (2022) · Addiction · doi:10.1111/add.15998 · Cited by 27
“Published studies have documented higher mortality in the first 4 weeks off treatment [5]; therefore, Kaplan – Meier curves for all-cause mortality were generated to visually examine the survival probabilities across groups over time.”
InfluentialThe projected costs and benefits of a supervised injection facility in Seattle, WA, USA
Hood, J. E., Behrends, C. N., Irwin, A., Schackman, B. R., Chan, D., Hartfield, K., Hess, J., Banta‐Green, C. J., Whiteside, L., Finegood, B., et al. (2019) · International Journal of Drug Policy · doi:10.1016/j.drugpo.2018.12.015 · Cited by 27
Get Waivered: A Resident-Driven Campaign to Address the Opioid Overdose Crisis
Martin, A., Kunzler, N. M., Nakagawa, J., Lee, B., Wakeman, S. E., Weiner, S. G., & Raja, A. S. (2019) · Annals of Emergency Medicine · doi:10.1016/j.annemergmed.2019.04.035 · Cited by 27
Bukten, A., Stavseth, M. R., & Clausen, T. (2019) · BMC Health Services Research · doi:10.1186/s12913-019-4382-9 · Cited by 27
“In a recent meta-analysis, Sordo and colleagues [14] synthesised evidence from cohort studies Table 2 All cause and cause-specific mortality rates, before, during and after treatment; crude mortality rates (CMR) per 1000 person-years and 95% confidence interval”
BackgroundResultBahji, A., Carlone, D., & Altomare, J. (2019) · Addiction · doi:10.1111/add.14946 · Cited by 27
Stahler, G. J., & Mennis, J. L. (2020) · Drug and Alcohol Dependence · doi:10.1016/j.drugalcdep.2020.108067 · Cited by 27
Finlay, A. K., Morse, E. F., Stimmel, M. A., Taylor, E. N., Timko, C., Harris, A. H. S., Smelson, D. A., Yu, M., Blue‐Howells, J., & Binswanger, I. A. (2020) · Journal of General Internal Medicine · doi:10.1007/s11606-020-05944-6 · Cited by 27
Tiako, M. J. N., Culhane, J. F., South, E. C., Srinivas, S. K., & Meisel, Z. F. (2020) · JAMA Network Open · doi:10.1001/jamanetworkopen.2020.29043 · Cited by 27
Hatch‐Maillette, M. A., Peavy, K. M., Tsui, J. I., Banta‐Green, C. J., Woolworth, S., & Grekin, P. (2020) · Journal of Substance Abuse Treatment · doi:10.1016/j.jsat.2020.108223 · Cited by 27
Overcoming Barriers to Treatment of Opioid Use Disorder
Olsen, Y. K., Fitzgerald, R. M., & Wakeman, S. E. (2021) · JAMA · doi:10.1001/jama.2021.1741 · Cited by 27
Sokol, R. G., Tammaro, E., Kim, J. Y., & Stopka, T. J. (2021) · Substance Use & Misuse · doi:10.1080/10826084.2021.1906280 · Cited by 27
“…disorder (MOUD), such as buprenorphine-naloxone (B/N), methadone, and naltrexone, have been proven to cut mortality rates by more than three-fold (Sordo et al., 2017), only two in five patients with opioid use disorder (OUD) receive these evidence-based treatments (Larochelle et al., 2018;…”
BackgroundSamuels, E. A., Wentz, A. E., McCormick, M., McDonald, J., Marshall, B. D. L., Friedman, C., Koziol, J. A., & Alexander-Scott, N. E. (2021) · Annals of Emergency Medicine · doi:10.1016/j.annemergmed.2021.02.004 · Cited by 27
Zhang, P., Tossone, K., Ashmead, R., Bickert, T., Bailey, E., Doogan, N., Mack, A., Schmidt, S., & Bonny, A. E. (2021) · Journal of Substance Abuse Treatment · doi:10.1016/j.jsat.2021.108686 · Cited by 27
Lambdin, B. H., Kan, D., & Kral, A. H. (2022) · Substance Abuse Treatment Prevention and Policy · doi:10.1186/s13011-022-00483-1 · Cited by 27
“Buprenorphine, a MOUD approved by the US Food and Drug Administration in 2002, has a strong evidence-base showing reductions in opioid use and opioid overdose mortality [2, 3].”
BackgroundChatterjee, A., Weitz, M., Savinkina, A. A., Macmadu, A., Madushani, R. W. M. A., Potee, R. A., Ryan, D., Murphy, S. M., Walley, A. Y., & Linas, B. P. (2023) · JAMA Network Open · doi:10.1001/jamanetworkopen.2023.7036 · Cited by 27
Jakubowski, A. U., Singh‐Tan, S., Torres‐Lockhart, K., Nahvi, S., Stein, M., Fox, A. D., & Lu, T. Y. (2023) · Addiction Science & Clinical Practice · doi:10.1186/s13722-023-00386-x · Cited by 27
“Differences between initiators and non‐initiators Among those who had initiated buprenorphine and/or methadone, the median number of patients initiated was 2 [Q1, Q3] = [1, 2] for buprenorphine and 3 [Q1, Q3] = [1, 5] for methadone.”
BackgroundLong‐Term Retention in an Outpatient Behavioral Health Clinic With Buprenorphine
Montalvo, C., Stankiewicz, B., Brochier, A., Henderson, D. C., & Borba, C. P. C. (2019) · American Journal on Addictions · doi:10.1111/ajad.12896 · Cited by 26
Methadone treatment of arrestees: A randomized clinical trial
Schwartz, R. P., Kelly, S. M., Mitchell, S. G., O’Grady, K. E., Sharma, A., & Jaffe, J. H. (2019) · Drug and Alcohol Dependence · doi:10.1016/j.drugalcdep.2019.107680 · Cited by 26
“, 2009) and reduced drug-related mortality (Sordo et al., 2017).”
Harvey, L. M., Fan, W., Cano, M. Á., Vaughan, E. L., Arbona, C., Essa, S., Sanchez, H. F., & de Dios, M. A. (2020) · Journal of Substance Abuse Treatment · doi:10.1016/j.jsat.2020.01.016 · Cited by 26
Diagnosis and Management of Opioid Use Disorder in Hospitalized Patients
Herscher, M., Fine, M., Navalurkar, R., Hirt, L., & Wang, L. (2020) · Medical Clinics of North America · doi:10.1016/j.mcna.2020.03.003 · Cited by 26
Cheema, E. U., McGuinness, K., Hadi, M. A., Paudyal, V., Elnaem, M. H., Alhifany, A. A., Elrggal, M. E., & Hamid, A. A. (2020) · Journal of Pain Research · doi:10.2147/jpr.s280462 · Cited by 28
Emergency department‐initiated buprenorphine protocols: A national evaluation
Guo, C. Z., D’Onofrio, G., Fiellin, D. A., Edelman, E. J., Hawk, K. F., Herring, A. A., McCormack, R. P., Perrone, J., & Cowan, E. A. (2021) · Journal of the American College of Emergency Physicians Open · doi:10.1002/emp2.12606 · Cited by 26
Russell, C., Nafeh, F., Pang, M., MacDonald, S. F., Derkzen, D. M., Rehm, J. T., & Fischer, B. (2022) · BMC Public Health · doi:10.1186/s12889-022-12685-0 · Cited by 26
“Furthermore, correctional populations face high odds of substance userelated relapse and overdose upon release, which can be mediated by OAT provision [48, 60].”
BackgroundBemanian, M., Vold, J. H., Chowdhury, R., Aas, C. F., Gjestad, R., Johansson, K. A., & Fadnes, L. T. (2022) · International Journal of Environmental Research and Public Health · doi:10.3390/ijerph19095754 · Cited by 26
Mintz, C. M., Xu, K. Y., Presnall, N. J., Hartz, S. M., LEVIN, F. R., Scherrer, J. F., Bierut, L. J., & Grucza, R. A. (2022) · JAMA Network Open · doi:10.1001/jamanetworkopen.2022.11634 · Cited by 26
Metadata
- Authors
- Sordo, L., Barrio, G., Bravo, M. J., Indave, B. I., Degenhardt, L., Wiessing, L., Ferri, M., & Pastor-Barriuso, R.
- Affiliations
- Universidad Complutense de Madrid (ES)
- Instituto de Salud Carlos III (ES)
- The University of Melbourne (AU)
- European Monitoring Centre for Drugs and Drug Addiction (PT)
- Corresponding author
- Barrio, Gregorio
- Venue
- BMJ
- Publisher
- BMJ
- Published
- 2017-04-26
- Volume
- 357
- Pages
- j1550
- ISSN
- 1756-1833 (ISSN-L)
- 0959-8138
- PMC
- PMC5421454
- OpenAlex
- W2608446001
- Cited by
- 1,816
- References
- 76
- Citations by year
- 2026: 156 · 2025: 194 · 2024: 201 · 2023: 239 · 2022: 228 · 2021: 261 · 2020: 213 · 2019: 187 · 2018: 99 · 2017: 32
- FWCI
- 23.58
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- BMJ (publishedVersion, cc-by-nc)
- Europe PMC (PubMed Central) (publishedVersion, cc-by-nc)
- PubMed Central (publishedVersion, cc-by-nc)
- PubMed (publishedVersion)
- LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion, cc-by-nc-sa)
- Minerva Access (University of Melbourne) (submittedVersion, cc-by-nc)
- HighWire Press Open Archive (submittedVersion)
- Topics
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Opioid Use Disorder Treatment
- Health Sciences › Medicine › Epidemiology › Substance Abuse Treatment and Outcomes
- Health Sciences › Medicine › Epidemiology › HIV, Drug Use, Sexual Risk
- Keywords
- opioid substitution therapy, methadone, buprenorphine, opioid use disorder, all-cause mortality, drug overdose deaths, treatment retention, treatment discontinuation, harm reduction, opioid antagonists
- MeSH terms
- Buprenorphine, Humans, Methadone, Opioid-Related Disorders, Narcotics, Risk, Opiate Substitution Treatment, Drug Overdose
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