title: Factor structure of the Spanish version of the Patient Health Questionnaire-9 in Mexican women.
abstract: Structure of the Spanish version of the nine-item Patient Health Questionnaire (PHQ-9) has been inconclusive. We report the factor structure of the PHQ-9 in 55,555 women from the Mexican Teachers' Cohort (MTC). Factor structure of the PHQ-9 was assessed by exploratory and confirmatory factor analyses in two sub-samples (n = 27,778 and 27,777 respectively). A one-factor model of the PHQ-9 was the solution with the best fit to the data, exhibiting strong factor loadings (0.71 to 0.90) and high internal consistency (Cronbach's alpha = 0.89). A prevalence rate of moderate to high severity of depressive symptoms of 12.6% was identified. Results suggest that a global score is an appropriate measure of depressive symptoms and commend the use of the Spanish PHQ-9 as a measure of depression for research and clinical purposes.
authors.affiliation: Department of Psychiatry, Michigan State University, Lansing, MI, USA.
authors.forename: Itziar
authors.initials: I
authors.lastname: Familiar
authors.forename: Eduardo
authors.initials: E
authors.lastname: Ortiz-Panozo
authors.forename: Brian
authors.initials: B
authors.lastname: Hall
authors.forename: Isabel
authors.initials: I
authors.lastname: Vieitez
authors.forename: Isabelle
authors.initials: I
authors.lastname: Romieu
authors.forename: Ruy
authors.initials: R
authors.lastname: Lopez-Ridaura
authors.forename: Martin
authors.initials: M
authors.lastname: Lajous
mesh_terms: D000328:Adult; D000367:Age Factors; D015331:Cohort Studies; D003866:Depressive Disorder / Q000175:diagnosis* / Q000453:epidemiology*; D005163:Factor Analysis, Statistical; D005260:Female; D006304:Health Status; D006801:Humans; D008403:Mass Screening; D008800:Mexico; D008875:Middle Aged; D011594:Psychometrics; D011795:Surveys and Questionnaires; D014175:Translating; D016387:Women's Health
keywords: Mexico; Patient Health Questionnaire-9; depression assessment; factor structure; women