Prevalence of mental disorders among adult residents in Liaoning province,China

Objective To describe current prevalence and distribution of all types of mental disorders among adult residents in Liaoning province and to provide evidences for developing a provincial mental health plan.Methods Stratified multistage cluster randomization was used to recruit 24 000 urban and rural residents aged 18 years and above in 7 municipalities.All the participants were screened with the expanded version of the General Health Questionnaire (GHQ-12) and assigned into one of the three groups at high,moderate,and low risk of having a mental disorder.Then,based on the criterion of Diagnostic and Statistical Manual of Mental Disorders-4th Edition(DSM-IV),the diagnostic examination was performed by psychiatrists among 100%,40%,and 10% of the participants of the groups with high,moderate,and low risk of having a mental disorder using Structured Clinical Interview for DSM-IV Axis I Disorders-Patient Edition (SCID-I/P).The survey was carried out between October 2014 and June 2015.Results Of the residents,82.22% (19 733) completed the survey.The adjusted current (in the previous one month) prevalence rate of any mental disorder was 14.05% (95% confidence interval:13.57%-15.47%).The overall prevalence rate of mental disorders was higher in the males (15.46%) than in the females (12.93%),and slightly higher in rural participants (14.83%) than in urban participants (13.04%).Among all the participants,the three most common mental disorders were affective disorder (4.57%),anxiety disorder (3.63%),and substance use disorder (2.88%).Alcohol use disorder (2.86%) and major depression disorder (2.39%) were the most prevalent specific mental disorders.Conclusion The current prevalence rate of mental disorders is relatively high among adult residents and mental disorder has become a major public health problem in Liaoning province.