title: Evaluation of the psychometric properties of the Self-Reporting Questionnaire (SRQ-20) in a sample of Vietnamese adults.
abstract: OBJECTIVE
  There are significant gaps in the literature on the prevalence of mental health problems and associated needs in Vietnam. A thorough understanding of culture-specific expressions of psychiatric distress is vital for the identification of the mental health needs of a community, and more research on the development and evaluation of culturally-sensitive mental health assessments is warranted. This study aims to evaluate the psychometric properties of the World Health Organization 20-item Self-Reporting Questionnaire (SRQ-20) in an epidemiologic study of Vietnamese adults.
  
  
  METHODS
  A latent variable modeling approach investigated the underlying factor structure of the SRQ-20 items. Exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were conducted on SRQ-20 item-level data gathered from 4980 participants.
  
  
  RESULTS
  Based on scree plots and EFA results, two latent structures were deemed plausible and were subsequently subjected to further modeling. A bi-factor model (BFM) and a correlated three-factor model solution (Negative Affect, Somatic Complaints, and Hopelessness) provided reasonable fits. The BFM specifies a single dominant General Distress factor (all SRQ-20 items) with orthogonal group factors for the subsets of items: Negative Affect (9 items), Somatic Complaints (8 items), and Hopelessness (3 items). This model fit the data as well or better than the three-factor model. Results also showed differences in endorsement rates of SRQ-20 items among males and females.
  
  
  CONCLUSIONS
  Study results provide an evaluation of the psychometric properties of a commonly used screening tool and offer insight into the presentation of mental distress in a representative sample of Vietnamese adults.
authors.affiliation: Hunter Holmes McGuire VA Medical Center, Richmond, VA 23249, USA. Kelcey.Stratton@va.gov
authors.forename: Kelcey J
authors.initials: KJ
authors.lastname: Stratton
authors.forename: Steven H
authors.initials: SH
authors.lastname: Aggen
authors.forename: Lisa K
authors.initials: LK
authors.lastname: Richardson
authors.forename: Ron
authors.initials: R
authors.lastname: Acierno
authors.forename: Dean G
authors.initials: DG
authors.lastname: Kilpatrick
authors.forename: Mario T
authors.initials: MT
authors.lastname: Gaboury
authors.forename: Trinh Luong
authors.initials: TL
authors.lastname: Tran
authors.forename: Lam Tu
authors.initials: LT
authors.lastname: Trung
authors.forename: Nguyen Thanh
authors.initials: NT
authors.lastname: Tam
authors.forename: Tran
authors.initials: T
authors.lastname: Tuan
authors.forename: La Thi
authors.initials: LT
authors.lastname: Buoi
authors.forename: Tran Thu
authors.initials: TT
authors.lastname: Ha
authors.forename: Tran Duc
authors.initials: TD
authors.lastname: Thach
authors.forename: Ananda B
authors.initials: AB
authors.lastname: Amstadter
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000175:diagnosis* / Q000453:epidemiology; D008875:Middle Aged; D020380:Needs Assessment; D015995:Prevalence; D011594:Psychometrics / Q000379:methods*; D057566:Self Report; D012737:Sex Factors; D011795:Surveys and Questionnaires; D014744:Vietnam / Q000453:epidemiology