Adjunctive Bright Light Therapy for Bipolar Depression: A Randomized Double-Blind Placebo-Controlled Trial

May combine two claims.

Antidepressant monotherapy can induce hypomania and rapid cycling.

“Antidepressant monotherapy can induce hypomania and rapid cycling (3).”

• cites [3] sourcePartly supported

  The Clinical and research implications section reports switches into hypomania or mania during antidepressant treatment, particularly with venlafaxine. But the Method section says the antidepressants were added to mood stabilisers, not used as monotherapy, and the Rapid cycling section treats rapid cycling as an existing patient status rather than an outcome induced by treatment. Page numbers are unavailable in our copy. (LLM, conf=0.88)

  Experimental — accuracy not yet measured

Probably not a substantial claim: may not pass S3 (load-bearing).

In seasonal affective disorder and nonseasonal depression, the response to morning light therapy is typically attributed to phase-resetting effects.

“In seasonal affective disorder (27,28) and nonseasonal depression (29), the response to morning light therapy is typically attributed to the phase-resetting effects (28).”

• cites [27] sourceNot checked — no full text of the source
• cites [28] sourcePartly supported

  The paper’s opening discussion (page unavailable) says that morning light could relieve SAD through a corrective circadian phase advance, supporting the phase-resetting explanation for winter depression. Its Conclusions mention nonseasonal depression only as a subject for future study; our copy does not establish that explanation for nonseasonal depression. (LLM, conf=0.85)

  Experimental — accuracy not yet measured
• cites [29] sourceNot checked — no full text of the source

May combine two claims.

The active treatment group had lower clinical severity than the inactive treatment group, but the difference was not significant.

“The active treatment group also experienced a higher response rate, lower clinical severity, less anxiety, fewer social problems, fewer neurovegetative symptoms, and better sleep quality compared with the inactive treatment group, but the differences were not significant.”

Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

Forty-five patients attended one or more postbaseline visits (median=6 visits), and 40 patients (87%) completed the study.

“Forty-five patients attended one or more postbaseline visits (median=6 visits), and 40 patients (87%) completed the study (Table 3).”

Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

The active treatment group had better sleep quality than the inactive treatment group, but the difference was not significant.

“The active treatment group also experienced a higher response rate, lower clinical severity, less anxiety, fewer social problems, fewer neurovegetative symptoms, and better sleep quality compared with the inactive treatment group, but the differences were not significant.”

Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

Sleep quality improved in both groups and did not differ significantly between them.

“Sleep quality improved in both groups and did not differ significantly between them.”

May combine two claims.

The active treatment group had fewer neurovegetative symptoms than the inactive treatment group, but the difference was not significant.

“The active treatment group also experienced a higher response rate, lower clinical severity, less anxiety, fewer social problems, fewer neurovegetative symptoms, and better sleep quality compared with the inactive treatment group, but the differences were not significant.”

May combine two claims.

The active treatment group had a higher response rate than the inactive treatment group, but the difference was not significant.

“The active treatment group also experienced a higher response rate, lower clinical severity, less anxiety, fewer social problems, fewer neurovegetative symptoms, and better sleep quality compared with the inactive treatment group, but the differences were not significant.”

Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

One patient enrolled during pregnancy; analyses with and without her indicated no differences in outcomes.

“One patient enrolled during pregnancy; the analyses with and without her indicated no differences in outcomes.”

Probably not a substantial claim: may not pass S3 (load-bearing).

The frequency of suicidal thoughts (23.9% for the sample) did not differ significantly between groups.

“The frequency of suicidal thoughts (23.9% for the sample) did not differ significantly between groups.”

Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

The active treatment group had fewer social problems than the inactive treatment group, but the difference was not significant.

“The active treatment group also experienced a higher response rate, lower clinical severity, less anxiety, fewer social problems, fewer neurovegetative symptoms, and better sleep quality compared with the inactive treatment group, but the differences were not significant.”

Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

The active treatment group had less anxiety than the inactive treatment group, but the difference was not significant.

“The active treatment group also experienced a higher response rate, lower clinical severity, less anxiety, fewer social problems, fewer neurovegetative symptoms, and better sleep quality compared with the inactive treatment group, but the differences were not significant.”

Probably not a substantial claim: may not pass S3 (load-bearing).

The median number of postbaseline visits differed significantly between groups (median=6 [IQR=6-6] active vs median=6 [IQR=5-6] inactive; U=185, p=0.003).

“Although the median number of postbaseline visits (median=6 [interquartile range=6-6] for the active treatment group, compared with median=6 [interquartile range=5-6] for the inactive treatment group; U=185, p=0.003) differed significantly between groups”

May combine two claims.

Patients in both conditions experienced infrequent side effect worsening and, rarely, thoughts of suicide.

“Patients in both conditions experienced infrequent side effect worsening and, rarely, thoughts of suicide (see Tables 3 and 4).”

Probably not a substantial claim: may not pass S3 (load-bearing).

The secondary longitudinal analyses were not significant.

“The secondary longitudinal analyses were not significant (not reported here).”

• AssumptionThe authors state this as an assumption: The secondary longitudinal analyses assumed fixed effects of intervention group, study week, and group-by-week interaction, and a random patient effect.

May combine two claims.

The odds ratio for remission with active versus inactive treatment was 7.50 (95% CI=1.80, 31.28, p=0.003); adjusted odds ratio=12.64 (95% CI=2.16, 74.08, p=0.004).

“odds ratio=7.50,95% CI=1.80, 31.28,p=0.003; adjusted odds ratio=12.64,95% CI=2.16, 74.08, p=0.004”

Probably not a substantial claim: may not pass S3 (load-bearing).

Expectations at endpoint were not significantly different between groups.

“Expectations at endpoint were not significantly different between groups.”

Classified as probably not a substantial claim. May combine two claims.

Eligible patients were randomly assigned in a 1:1 ratio to active bright white or inactive dim red light and stratified by antidepressant use with a block design (six patients per block).

“Eligible patients were randomly assigned in a 1:1 ratio to active bright white or inactive dim red light and stratified by antidepressant use with a block design (six patients per block).”

May combine two claims.

Light therapy presents no additional risk, and nonpharmacological treatments are limited.

“We included pregnant women because light therapy presents no additional risk and nonpharmacological treatments are limited (15).”

• cites [15] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

The study proposed to enroll two groups of 30 patients for 80% power to detect group differences in mean SIGH-ADS score of 2.6 points with a moderate effect size (0.37) and remission rates of 33%-38% (OR 6.9 at alpha 0.05).

“We proposed to enroll two groups of 30 patients for an 80% power to detect group differences in the mean SIGH-ADS score of 2.6 points with a moderate effect size (0.37) and remission rates of 33%238% (for an odds ratio of 6.9 at an alpha of 0.05”

• cites [27] sourceNot checked — no full text of the source

May combine two claims.

In the authors' pilot, five additional patients were enrolled; three had a full response, and one who had an initial partial response responded fully after transitioning to morning light.

“We enrolled five additional patients; three had a full response, and one who had an initial partial response responded fully after transitioning to morning light.”

May combine two claims.

Personnel conducting visits and clinical ratings were blind to treatment condition to avoid allegiance effects and worked separately from nonblinded personnel who dispensed light boxes.

“Personnel conducting the visits and performing the clinical ratings were blind to the treatment condition to avoid allegiance effects, and they worked separately from the nonblinded personnel, who dispensed the study light boxes”

May combine two claims.

In a prior pilot, morning light therapy induced full response in one of four patients and hypomania in the other three.

“Morning light therapy induced full response in one of four patients and, unexpectedly, hypomania in the other three patients (5).”

• cites [5] sourceNot checked — no full text of the source

Classified as probably not a substantial claim.

Patients agreed not to search for information on light box design.

“Patients agreed not to search for information on light box design.”

Classified as probably not a substantial claim.

The same dosing protocol was implemented for both groups.

“We implemented the same dosing protocol for both groups (25).”

• cites [25] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S3 (load-bearing).

Adjusted analyses accounted for potential confounding effects of age, time of enrollment (season), and baseline SIGH-ADS and GAF scores.

“The adjusted analyses accounted for the potential confounding effects of age, time of enrollment (season), and baseline SIGH-ADS and GAF scores.”

Probably not a substantial claim: may not pass S3 (load-bearing).

Response to light therapy is associated with sleep quality and circadian and seasonality traits.

“Response to light therapy is associated with sleep quality and circadian and seasonality traits, which we assessed with the Pittsburgh Sleep Quality Index (23), the Morningness-Eveningness Questionnaire (24), and the Personal Inventory for Depression and Seasonal Affective Disorder (10), respectively.”

• cites [23] sourceNot checked — no full text of the source
• cites [24] Horne JA, 1976, Int J ChronobiolNot matched

  Couldn’t be matched to a paper in Crossref, so it can’t be checked.

• cites [10] sourceNot checked — no full text of the source

May combine two claims.

At midday, bright light exposure can phase-advance and increase the amplitude of nocturnal melatonin production in healthy subjects and in elderly patients with insomnia.

“At midday, bright light exposure can phase-advance and increase the amplitude of nocturnal melatonin production in healthy subjects (12) and in elderly patients with insomnia (13).”

• cites [12] sourceNot checked — no full text of the source
• cites [13] Mishima K, 2001, J Clin Endocrinol Metab sourceNot checked — no full text of the source

May combine two claims.

Depressed bipolar patients frequently have delayed sleep phase and atypical features (hypersomnia, hyperphagia, and lethargy), which are predictors of light therapy response.

“Depressed bipolar patients frequently have delayed sleep phase and atypical features (hypersomnia, hyperphagia, and lethargy), which are predictors of light therapy response (4).”

• cites [4] sourceNot checked — no full text of the source

Classified as probably not a substantial claim.

A modified intent-to-treat approach was used whereby all participants were analyzed according to the group to which they were randomized.

“We used a modified intent-to-treat approach whereby all participants were analyzed according to the group to which they were randomized.”

Classified as probably not a substantial claim. May combine two claims.

Patients with bipolar disorder often have recurrent major depression and residual mood symptoms.

“Patients with bipolar disorder often have recurrent major depression and residual mood symptoms (1).”

• cites [1] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S3 (load-bearing).

Because of the sample size and numbers per group, no adjustments were made for multiple hypothesis tests.

“Because of the sample size and numbers per group, we did not make adjustments for multiple hypothesis tests.”

Classified as probably not a substantial claim. May combine two claims.

The study design elements were incorporated to mitigate unbalanced treatment expectations; therefore, the observed treatment response was expected to be related to the active light condition rather than to nonspecific effects.

“The study design elements were incorporated to mitigate unbalanced treatment expectations; therefore, we expected the observed treatment response to be related to the active light condition rather than to nonspecific effects.”

Classified as probably not a substantial claim. May combine two claims.

Treatment condition was disclosed to patients only at the final visit and to blinded personnel and statisticians only after analyses were completed.

“We disclosed the treatment condition to patients only at the final visit and to blinded personnel and statisticians only after the analyses were completed.”

Probably not a substantial claim: may not pass S3 (load-bearing).

Expectations can moderate outcomes, especially in clinical trials involving light therapy, which test a visible intervention.

“Expectations can moderate outcomes, especially in clinical trials involving light therapy, which test a visible intervention (10).”

• cites [10] sourceNot checked — no full text of the source

Classified as probably not a substantial claim.

The active and placebo light boxes appeared identical when not illuminated.

“The active and placebolightboxes appeared identical when not illuminated.”

Probably not a substantial claim: may not pass S3 (load-bearing).

Enrollment was stopped at 23 participants per group because funding had ended.

“We stopped enrollment at 23 participants per group because funding had ended.”

May combine two claims.

Sleep parameters (decreased awake time at night, increased sleep efficiency, and reduced wake time after sleep onset) have been found to be improved with midday light therapy.

“Sleep parameters (decreased awake time at night, increased sleep efficiency, and reduced wake time after sleep onset) have also been found to be improved with midday light therapy (13).”

• cites [13] Mishima K, 2001, J Clin Endocrinol Metab sourceNot checked — no full text of the source

May combine two claims.

Because both groups had moderate levels of depression and impaired functioning, categorically, and no other demographic or clinical differences, we judged the groups to be comparable at baseline.

“Because both groups had moderate levels of depression and impaired functioning, categorically, and no other demographic or clinical differences, we judged the groups to be comparable at baseline.”

May combine two claims.

Most other light studies have implemented full-dose, nontitration protocols and similarly detected remission after 5 weeks for antepartum depression and after 4, 6, and 8 weeks for nonseasonal depression.

“Most other light studies have implemented full-dose, nontitration protocols and similarly detected remission after 5 weeks for antepartum depression (15) and after 4, 6, and 8 weeks for nonseasonal depression (29).”

• cites [15] sourceNot checked — no full text of the source
• cites [29] sourceNot checked — no full text of the source

Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

We did not explore the responses in patients with or without seasonal affective disorder because subanalyses would be underpowered and would provide inconclusive results.

“We did not explore the responses in patients with or without seasonal affective disorder because subanalyses would be underpowered and would provide inconclusive results.”

Probably not a substantial claim: may not pass S3 (load-bearing).

Block randomization should mitigate the need for seasonality adjustment.

“Block randomization should mitigate the need for seasonality adjustment.”

Probably not a substantial claim: may not pass S3 (load-bearing).

We adjusted for time of enrollment.

“Even so, we adjusted for time of enrollment.”

May combine two claims.

The sample size and the final numbers per group may have constrained our capacity to detect treatment effects and contributed to the wide confidence limits in some outcome measures.

“Even so, the sample size and the final numbers per group may have constrained our capacity to detect treatment effects and contributed to the wide confidence limits in some outcome measures.”

May combine two claims.

The number of participants enrolled in February and March was unbalanced despite randomization, which would bias against the active intervention.

“Given that the number of participants enrolled in February and March was unbalanced despite randomization, this actually would bias against the active intervention.”

May combine two claims.

Both groups titrated to the same maximum light dose and the same actual light dose at endpoint.

“Both groups titrated to the same maximum light dose and the same actual light dose at endpoint”

Probably not a substantial claim: may not pass S3 (load-bearing).

By examining selected outcomes within the period of weeks 4-6, we were able to consider the patients who completed the dosing protocol and likely received the appropriate exposure to light therapy.

“By examining selected outcomes within the period of weeks 4-6, we were able to consider the patients who completed the dosing protocol and likely received the appropriate exposure to light therapy”

Classified as probably not a substantial claim.

We were unable to consider the patients who withdrew before week 4, many of whom were in the placebo comparator group.

“however, we were unable to consider the patients who withdrew before then, many of whom were in the placebo comparator group.”

Probably not a substantial claim: may not pass S3 (load-bearing).

Given that participants had a SCID-confirmed current major depressive episode (minimum duration of 2 weeks), it is possible that the patients who enrolled in the fall and winter experienced the onset of depression weeks or months earlier and did not have a purely seasonal or winter depression.

“Given that participants had a SCID-confirmed current major depressive episode (minimum duration of 2 weeks), it is possible that the patients who enrolled in the fall and winter experienced the onset of depression weeks or months earlier and did not have a purely seasonal or winter depression.”

May combine two claims.

The novel use of a dose-titration protocol, implementation of bright light therapy at midday, and the requirement for concurrent antimanic treatment mitigated the risks for emergent mania or hypomania.

“The novel use of a dose-titration protocol, implementation of bright light therapy at midday, and the requirement for concurrent antimanic treatment mitigated the risks for emergent mania or hypomania.”

Probably not a substantial claim: may not pass S3 (load-bearing).

By randomly assigning patients to active or placebo light therapy, the degree of seasonality distributed equally to both treatment groups, as expected.

“By randomly assigning patients to active or placebo light therapy, the degree of seasonality distributed equally to both treatment groups, as expected.”

Classified as probably not a substantial claim. May combine two claims.

We implemented careful design features and enrolled community-based patients with bipolar disorder to better mirror clinical practice and improve the generalizability of the results.

“We implemented careful design features and enrolled community-based patients with bipolar disorder to better mirror clinical practice and improve the generalizability of the results.”

May combine two claims.

This implicates a vulnerability to both seasonal and nonseasonal depression, which is consistent with published reports on the phenomenology of bipolar disorder.

“This implicates a vulnerability to both seasonal and nonseasonal depression, which is consistent with published reports on the phenomenology of bipolar disorder (33).”

• cites [33] sourceNot checked — no full text of the source