title: What came first, major depression or substance use disorder? Clinical characteristics and substance use comparing teens in a treatment cohort.
abstract: This study utilized data on a treatment cohort from a randomized clinical trial that recruited adolescents with co-occurring major depression and substance use disorder (N=126). The purpose of this study was to compare adolescents for whom the onset of depression was first versus those for whom the onset of substance use disorder was first or in the same year as depression. Intake clinical evaluations were abstracted to yield common stressors that included childhood abuse, early loss or death, exposure to violence, and attachment problems. Tobacco, alcohol, and cannabis initiation and dependence were compared for the depression first and substance use disorder first groups, and within those groups by gender. Among the substances studied, only cannabis dependence was significantly more prevalent among those with depression first. Comparisons suggest some differences in the developmental path toward comorbid depression and substance use disorders, but remarkable similarity in measures of dependence and severity. Although small samples limited statistical significance, observed differences suggest possible avenues for prevention or intervention.
authors.affiliation: University of Colorado at Denver and Health Sciences Center, School of Medicine, Fitzsimons Campus, NCNHB, P.O. Box 6508, Campus Box F800, Aurora, CO 80045, USA. anne.libby@uchsc.edu
authors.forename: Anne M
authors.initials: AM
authors.lastname: Libby
authors.forename: Heather D
authors.initials: HD
authors.lastname: Orton
authors.forename: Shannon K
authors.initials: SK
authors.lastname: Stover
authors.forename: Paula D
authors.initials: PD
authors.lastname: Riggs
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior / Q000523:psychology; D000328:Adult; D017668:Age of Onset; D019973:Alcohol-Related Disorders / Q000523:psychology; D015331:Cohort Studies; D003865:Major Depressive Disorder / Q000523:psychology*; D017831:Diagnosis, Dual (Psychiatry); D005190:Family; D005260:Female; D006801:Humans; D008297:Male; D002189:Marijuana Abuse / Q000523:psychology; D012720:Severity of Illness Index; D012737:Sex Factors; D013315:Stress, Psychological / Q000523:psychology; D019966:Substance-Related Disorders / Q000523:psychology*; D014029:Tobacco Use Disorder / Q000523:psychology