Motor Impulsivity Predicts Suicide in Bipolar Disorder, Depression
Individuals with mood disorders had higher impulsivity scores than individuals in the control group.
Self-reported motor impulsivity may be a significant predictor of suicide in patients with bipolar disorder and major depression, according to results published in Comprehensive Psychiatry.
These results indicate that impulsivity should be a target of interventions and public policy regarding suicide prevention.
The study included 2 groups of patients with bipolar disorder and major depressive disorder (n=52) and control patients matched by age and education (n=80). Of the patients with mood disorders, 26 had at least 1 previous suicide attempt (n=8 with major depressive disorder, n=9 with bipolar I, n=9 with bipolar II) and 26 had not previously attempted suicide (n=7 with major depressive disorder, n=10 with bipolar I, n=9 with bipolar II). Each participant completed behavioral and self-report measures of decision making and inhibitory control.
After analyzing the results, the researchers did not find a difference in cognitive performance between the groups.
The participants with mood disorders and a history of suicide attempt showed significantly higher motor and attentional impulsivity than the participants with mood disorders without a history of suicide attempt and control patients. After regression analysis, only motor impulsivity was a significant predictor of a history of suicide attempt (OR, 1.14; 95% CI, 1.001 - 1.300).
"These findings underscore the importance of self-report measures in neuropsychological assessment, and their contributions to the management and prognosis of patients with mood disorders," the researchers wrote.
Ponsoni A, Branco LD, Cotrena C, et al. Self-reported inhibition predicts history of suicide attempts in bipolar disorder and major depression. Compr Psychiatry. 2018;82(4):89-94.