title: Nine-year psychiatric trajectories and substance use outcomes: an application of the group-based modeling approach.
abstract: This study identifies longitudinal psychiatric trajectories of 934 adult individuals entering chemical dependency treatment in a private, managed care health plan and examines the relationship of these trajectories with substance use (SU) outcomes. The authors apply a group-based modeling approach to identify trajectory groups based on repeated measures of psychiatric severity for 9 years and identify four distinct groups. Results of multivariate logistic generalized estimating equation models find an association between psychiatric trajectories and long-term SU. Older cohorts and life course measures of marital status and employment status as individuals changed over time are related to drug and some alcohol outcomes.
authors.affiliation: Kaiser Permanente Northern California, Oakland, CA 94612-2403, USA. Felicia.W.Chi@kp.org
authors.forename: Felicia W
authors.initials: FW
authors.lastname: Chi
authors.forename: Constance M
authors.initials: CM
authors.lastname: Weisner
mesh_terms: D000293:Adolescent; D000328:Adult; D002140:California / Q000453:epidemiology; D015897:Comorbidity; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D001523:Mental Disorders / Q000453:epidemiology* / Q000628:therapy; D008875:Middle Aged; D008962:Models, Theoretical; D017063:Outcome Assessment, Health Care; D012720:Severity of Illness Index; D019966:Substance-Related Disorders / Q000453:epidemiology* / Q000628:therapy