title: Prevalence and correlates of major depressive disorder among rural-to-urban migrant workers in Shenzhen, China.
abstract: BACKGROUND
  In China, rural-to-urban migrant workers (MWs) are a large and vulnerable population that may be at high risk for depression, but previous studies focused on depressive symptoms of MWs and no study has investigated the epidemiology of major depressive disorder (MDD). The objective of this study was to determine the prevalence and correlates of one-month and lifetime MDD among MWs in Shenzhen, China, and mental health services utilization of MWs with lifetime MDD.
  
  
  METHODS
  A total of 3031 MWs were recruited from 10 manufacturing factories and interviewed with the Chinese version of the Mini International Neuropsychiatric Interview.
  
  
  RESULTS
  The one-month and lifetime prevalence rates of MDD were 1.39% (95% CI: 0.97%, 1.80%) and 5.08% (95% CI: 4.30%, 5.86%), respectively. No significant gender and age-group differences were found in these rates. The risk factors for lifetime MDD included lower education, worse living condition, poorer self-perceived physical health, migration before adulthood, infrequently calling family members, and having done lots of jobs. Only 3.25% of the respondents with lifetime MDD had sought professional help prior to the interview.
  
  
  CONCLUSIONS
  The MW sample was selected from manufacturing factories, we should be cautious in generalizing our findings to MWs of other industries.
  
  
  CONCLUSIONS
  Compared with the Chinese general population, MWs may have a similar prevalence of MDD, but the rate of lifetime mental health services use of MWs with lifetime MDD is extremely low. MDD is a major public health concern for this population. There is an urgent need to improve mental health services for MWs.
authors.affiliation: Department of Psychiatry, The Chinese University of Hong Kong, Hong Kong SAR.
authors.forename: Bao-Liang
authors.initials: BL
authors.lastname: Zhong
authors.affiliation: Shenzhen Key Laboratory for Psychological Healthcare, Shenzhen Institute of Mental Health, Shenzhen Kangning Hospital, Shenzhen Mental Health Center, Shenzhen, PR China.
authors.forename: Tie-Bang
authors.initials: TB
authors.lastname: Liu
authors.affiliation: Department of Psychiatry, The Chinese University of Hong Kong, Hong Kong SAR.
authors.forename: Sandra S M
authors.initials: SS
authors.lastname: Chan
authors.affiliation: Shenzhen Key Laboratory for Psychological Healthcare, Shenzhen Institute of Mental Health, Shenzhen Kangning Hospital, Shenzhen Mental Health Center, Shenzhen, PR China.
authors.forename: Dong
authors.initials: D
authors.lastname: Jin
authors.affiliation: Shenzhen Key Laboratory for Psychological Healthcare, Shenzhen Institute of Mental Health, Shenzhen Kangning Hospital, Shenzhen Mental Health Center, Shenzhen, PR China.
authors.forename: Chi-Yi
authors.initials: CY
authors.lastname: Hu
authors.affiliation: Shenzhen Key Laboratory for Psychological Healthcare, Shenzhen Institute of Mental Health, Shenzhen Kangning Hospital, Shenzhen Mental Health Center, Shenzhen, PR China.
authors.forename: Jing
authors.initials: J
authors.lastname: Dai
authors.affiliation: Department of Psychiatry, The Chinese University of Hong Kong, Hong Kong SAR. Electronic address: helenchiu@cuhk.edu.hk.
authors.forename: Helen F K
authors.initials: HF
authors.lastname: Chiu
mesh_terms: D000328:Adult; D000368:Aged; D002681:China / Q000453:epidemiology; D003865:Major Depressive Disorder / Q000175:diagnosis / Q000453:epidemiology*; D005260:Female; D006301:Health Services Needs and Demand / Q000706:statistics & numerical data; D006801:Humans; D008297:Male; D008605:Mental Health Services / Q000706:statistics & numerical data; D008875:Middle Aged; D016017:Odds Ratio; D010342:Patient Acceptance of Health Care / Q000523:psychology / Q000706:statistics & numerical data*; D015995:Prevalence; D012307:Risk Factors; D012424:Rural Population / Q000706:statistics & numerical data*; D012959:Socioeconomic Factors; D014171:Transients and Migrants / Q000523:psychology* / Q000706:statistics & numerical data*; D014505:Urban Population / Q000706:statistics & numerical data
keywords: China; Correlate; Major depression; Mental health services utilization; Migrant worker; Prevalence