Suicide Risk in Comorbid Bipolar Disorder and Obsessive-Compulsive Disorder: A Systematic Review

The co-occurrence of bipolar disorder (BD) and obsessive-compulsive disorder (OCD) seemed to be a poor prognostic factor associated with greater disability, lower social and occupational functioning, poorer treatment response, and higher suicidal ideas and attempts compared to BD patients.

A systematic review was conducted on the risk of suicide in BD-OCD patients compared to BD patients. Relevant papers published through August 2018 were identified searching the electronic databases MEDLINE, EMBASE, PsycINFO, and the Cochrane Library.

In all cases, diagnoses were according to the standard Diagnostic and Statistical Manual criteria and were established using validated assessment scales. More than 80% of the selected studies presented higher rates of history of suicide attempts and lifetime depressive episodes in BD-OCD patients compared to non-comorbid patients.

Osler's view that medicine should be a treatment of diseases, not of symptoms, is consistent with the approach of mood stabilization as the first objective in apparent BD-OCD patients, as opposed to immediate treatment with antidepressants. In line with that, especially in comorbid patients, lithium may be preferred because of its proven anti-suicidal effect.