Cognitive Behavioral Therapy Did Not Outperform Usual Care for Substance Users with Suicide Risk | Research

The takeaway

An 8-session CBT intervention for people with substance use disorders and suicide risk showed no advantage over treatment as usual in reducing suicidal thinking, substance use, or depression.

Read this if you want to understand treatment challenges for people with both substance use and suicide risk.

Cannabis use at baseline predicted persistent suicide ideation at 6 months

What the researchers found

Over 6 months, there were no completed suicides and only 2 suicide attempts among 185 participants, which is a positive outcome regardless of treatment group. Suicide ideation, alcohol consumption, and cannabis use all decreased over time in both groups.

However, there were no significant differences between the CBT intervention group and the treatment-as-usual group on any primary or secondary outcome. The specialized 8-session program plus group therapy did not outperform standard care in reducing suicidal ideation, substance use, depression, anxiety, or self-efficacy.

Notably, cannabis use at baseline was one of the factors that predicted persistent suicide ideation at 6-month follow-up, along with higher psychiatric symptom severity.

Why it matters

People with substance use disorders who also experience suicidal behavior are at high risk. This study tested whether a tailored intervention could improve outcomes, and the null result is informative: it suggests that simply adding structured CBT sessions may not be sufficient for this complex population, and different approaches may be needed.

The numbers in context

185 participants. 8-session intervention plus group therapy vs. TAU. 6-month follow-up. No completed suicides. 2 suicide attempts. No significant Treatment x Time interactions on any measure.

How the study worked

This multi-site randomized controlled trial enrolled 185 outpatients who presented with both suicide risk and concurrent substance use. Participants were randomized to either an opportunistic cognitive behavioral intervention package (OCB; 8 individual sessions plus group therapy) or treatment as usual (TAU) over 6 months. Primary outcomes included suicidal behavior, suicide ideation, and substance use levels. Secondary outcomes included depression, anxiety, and self-efficacy.

What this study cannot tell us

The control condition (treatment as usual) was not standardized and may have included effective therapeutic components. The study was powered to detect moderate effect sizes and may have missed smaller but meaningful differences. Low rates of suicide attempts made it difficult to detect differences in this outcome. Six months may be insufficient follow-up for this population.

How to read the evidence

This is a well-designed multi-site RCT with adequate sample size and follow-up, providing strong evidence that this specific intervention was not superior to standard care.

When this study was published

Published in 2014. Research on integrated treatments for co-occurring substance use and suicidality continues.

The bigger picture

Treating co-occurring substance use and suicide risk is one of the most challenging areas in mental health. This null result does not mean these patients cannot be helped, but it does indicate that the specific intervention tested was not more effective than standard care, which itself may have included beneficial elements.

Questions still open

What treatment approaches are effective for co-occurring substance use and suicide risk? Does cannabis use causally contribute to persistent suicidal ideation, or is it a marker of severity? Would more intensive or longer interventions show different results?

Common questions

Why is this null result important?

Null results prevent resources from being invested in ineffective programs. They also redirect the field toward alternative approaches and help establish what the minimum effective intervention looks like for complex populations.

Why did cannabis use predict persistent suicidal thinking?

The study found this association but did not determine causation. Cannabis use may be a marker of greater psychiatric severity, a coping mechanism for distress, or it may interact with mood and cognitive processes in ways that maintain suicidal ideation.

Read the original research

The efficacy of an opportunistic cognitive behavioral intervention package (OCB) on substance use and comorbid suicide risk: a multisite randomized controlled trial.

Journal of consulting and clinical psychology, 82(1), 130-40

View on PubMed ↗Publisher’s paper ↗

Citation

Morley, Kirsten C; Sitharthan, Gomathi; Haber, Paul S; Tucker, Peter; Sitharthan, Thiagarajan. (2014). The efficacy of an opportunistic cognitive behavioral intervention package (OCB) on substance use and comorbid suicide risk: a multisite randomized controlled trial.. Journal of consulting and clinical psychology, 82(1), 130-40. https://doi.org/10.1037/a0035310