Prevalence and socio-demographic correlates of mental disorders in Beijing residents in 2010

Abstract

Objective To study the prevalence and socio-demographic correlates of mental disorders in Beijing residents. Methods The multi-stage stratified cluster random sampling method was used,19 874 residents aged 18 or above who had lived for more than six months in Beijing were selected. Face-to-face assessment was conducted by trained investigators by using the Chinese version of the Structured Clinical Interview for DSM-Ⅳ Axis Ⅰ Disorders-Patient Edition (SCID-Ⅰ/P) to find any mental disorders, and the Mini-Mental State Examination (MMSE) to screen for dementia and mental retardation. Those who were positive on MMSE (MMSE ≤ 17 for those who completed elementary education or less, ≤23 for those who completed middle school or above) were further assessed to confirm dementia and mental retardation by using the SCID. Results 16 032 (80.7%) out of 19 874 eligible residents completed the face-to-face assessment. Adjusted by age and gender, the lifetime prevalence of all mental disorders was 120.8‰ (1 937/16 032, 115.8‰-125.9‰), and the top three most common ones were major depressive disorder (527, 32.9‰), alcohol dependence and abuse (311, 19.4‰), and anxiety disorder, NOS (270, 16.8‰). The point prevalence of all mental disorders was 75.3‰ (1 207/16 032, 71.2‰-79.4‰), the top three were specific phobias (187, 11.7‰), anxiety disorder, NOS (186, 11.6‰), and major depressive disorder (162, 10.1‰).The prevalence of mental disorders was significantly higher in the elderly (OR=1.014) , female (OR=1.428) , unemployed (OR=1.096) , people having poor rapports with family (OR=1.686) or others (OR=1.901) , smoking (OR=1.129) or drinking (OR=1.262) . The prevalence of mental disorders was significantly lower in the urban residents (OR=0.840) , people in a higher level of education (OR=0.813) , people who had got married/remarried or who had partner (OR=0.689) , people who had no family history of any mental disorders (OR=0.405) . Conclusions Approximately 12% of Beijing residents may meet at least one diagnosis of mental disorder in their lifetime; The prevalence of mental disorders is associated with older age, female gender, lower level of education, rural dwelling, positive family history of mental disorders, and poor social support system. Key words: Mental disorders; Epidemiology; Prevalence