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Case-control study links impaired decision-making tasks to suicide attempts in depressed patientsCan't weigh risks and rewards? Suicide attempters show different decision-making patterns

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Key Takeaway
Consider that impaired decision-making tasks are associated with suicide attempts in depressed patients, but causation is not established.

This case-control study included 132 participants: 49 depressed patients with suicide attempts, 34 patient controls with no personal history of suicide attempts, and 49 healthy controls. The study assessed clinical decision-making using the Iowa-Gambling-Task (IGT), a value-based decision-making battery, a mixed gambling task, and a Go/No-Go task.

Both patient groups showed lower IGT performance compared to healthy controls. Only suicide attempters had lower loss aversion than healthy controls. Suicide attempters exhibited more total and commission errors on the Go/No-Go task compared to both patient and healthy controls.

Patients who made an impulsive suicide attempt had higher delay discounting and lower loss aversion rates than healthy controls. Attempters who chose violent means performed worse than those with non-violent means in the first phase of the IGT and had lower loss aversion compared to both control groups. Poorer IGT performance was associated with lower loss aversion and higher suicidal intent.

Safety and tolerability were not reported. The study is observational, so associations are reported and causation is not established. Limitations were not reported, and findings may not generalize beyond the sample. Practice relevance highlights reduced sensitivity to losses, higher delay discounting, and impaired value-based learning in impulsive or violent suicidal acts, underscoring heterogeneity and the need for individualized approaches.

When someone is in crisis, how they weigh risks and rewards can be a matter of life and death. This study explored whether people who had attempted suicide process decisions differently than other depressed patients and healthy individuals. They used tasks that mimic real-life choices, like the Iowa Gambling Task, to see how people learn from good and bad outcomes.

The results showed clear differences. Both depressed groups struggled with these tasks compared to healthy controls, but the suicide attempters stood out. They were less deterred by potential losses and made more impulsive errors on a task that required stopping a pre-set action. This pattern was even stronger in people who had attempted suicide impulsively or with violent methods. The study also found a link: the worse someone was at learning from losses, and the more they were willing to wait for a bigger reward later, the higher their reported suicidal intent.

This study involved 132 people, including 49 who had attempted suicide. It's important to note this was a snapshot in time, not a long-term look, and it can't prove that these thinking patterns cause someone to attempt suicide. It could be that the attempt, or the depression itself, changed how they make decisions. The findings suggest that a one-size-fits-all approach to suicide prevention may miss the mark, and that understanding an individual's decision-making style could be key to helping them.

What this means for you:
People who attempt suicide may struggle to weigh risks and rewards, especially when impulsive.

Study Details

Study typeCase control
EvidenceLevel 4
PublishedApr 2026
View Original Abstract ↓
BackgroundPrevious studies showed impaired decision-making in suicide attempters, but the cognitive mechanisms in play and subgroup differences among attempters need further research. Understanding these differences is crucial for developing targeted interventions.MethodsFor the present case-control study, we recruited 49 depressed patients with histories of both mood disorders and suicide attempts, 34 patient controls with no personal history of suicide attempts, and 49 healthy controls. The participants completed clinical assessments and decision-making tasks: the Iowa-Gambling-Task (IGT), a value-based decision-making battery, a mixed gambling task, and a Go/No-Go task. The study was preregistered at ClinicalTrial.gov (NCT05230043).ResultsBoth patient groups showed lower IGT performance, and only suicide attempters lower loss aversion than healthy controls. Compared to both patient and healthy controls, suicide attempters exhibited more total and commission errors on the Go/No-Go task. Subgroup analysis revealed that patients who made an impulsive suicide attempt had higher delay discounting and lower loss aversion rates than healthy controls. Meanwhile, attempters who chose violent means performed worse than those with a non-violent means in the first phase of the IGT and had lower loss aversion compared to both control groups. Finally, poorer IGT performance was associated with lower loss aversion and higher suicidal intent.DiscussionIn addition to deficits in response inhibition in depressed suicide attempters, these findings highlight reduced sensitivity to losses, higher delay discounting and impaired value-based learning in impulsive or violent suicidal acts. They, therefore, underscore the heterogeneity within suicide attempters and highlight the need for individualized approaches in future research and clinical interventions.
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