A Study on the Factors Affecting the Duration between Diagnosis of Depressive Disorder and Suicide

Abstract

The purpose of this study is to identify the suicide risk factors associated with depression and propose measures to prevent suicide among individuals diagnosed with depression. We collected suicide death data through psychological autopsy interviews with bereaved families of 210 people who were diagnosed with depressive disorders before death. The interviews investigated stress events, suicide attempts after diagnosis, increased alcohol consumption, sleep disturbances, and anxiety symptoms in the three months preceding death, as well as family mental health problems and the time elapsed between suicide and diagnosis of depressive disorders. This study found that, on average, subjects experienced suicide 53.42 months after diagnosis, with a third of all suicides occurring within a year. Controlling for demographic variables, an increase in sleep problems and anxiety symptoms three months before death significantly affected the duration between depression diagnosis and suicide. Based on these findings, recommendations were made for early diagnosis and intervention for depression, assessment of sleep problems and anxiety symptoms in suicide risk evaluation for depressed patients, mandatory suicide prevention education for medical professionals, and expansion of social safety nets to prevent occupational and economic problems.