Objective: To systematically analyze the risk factors for suicide in patients with major depressive disorder (MDD) and assess the tendency of incidence change after controlling for risk factors, which may be helpful towards primary prevention of suicide in MDD. Methods: Case- control studies on risk factors of suicide in MDD were selected and screened for the main risk factors. Meta-analysis was used to calculate the pooled odds ratio(OR) and 95% confidence interval for each selected factor. Population attributable risk proportion(PARP) was estimated and incidence change after controlling risk factors was evaluated by using EXCEL. Results: 11 papers on risk factors of suicide in MDD were selected. The top five risk factors were hopelessness(OR=5.67), family history of suicide(OR=4.01), negative life-events(3.91), delusion (OR=3.41) and self-accusation(OR=2.85). The factors for high PARP were hopelessness(62.82%), anxiety(42.36%), negative life-events(28.96%) and cognitive disorder(23.91%). If the exposure to these 5 risk factors decrease by 25% and 50% in the future, the incidence of suicide rate in MDD patients would decreased by 15.70%, 10.59%, 10.27%, 7.24%, 5.97% and 31.41%, 21.18%, 20.55%, 14.48%, 11.95% respectively. Conclusion: Extreme thinking, unreasonable believe and cognitive disorder lead to low spirits among major depression patients, which are major reasons of suicide.
|