Association of Fluid Intelligence and Psychiatric Disorders in a Population-Representative Sample of US Adolescents.

ABSTRACT: Importance:Despite long-standing interest in the association of psychiatric disorders with intelligence, few population-based studies of psychiatric disorders have assessed intelligence. Objective:To investigate the association of fluid intelligence with past-year and lifetime psychiatric disorders, disorder age at onset, and disorder severity in a nationally representative sample of US adolescents. Design, Setting, and Participants:National sample of adolescents ascertained from schools and households from the National Comorbidity Survey Replication-Adolescent Supplement, collected 2001 through 2004. Face-to-face household interviews with adolescents and questionnaires from parents were obtained. The data were analyzed from February to December 2016. DSM-IV mental disorders were assessed with the World Health Organization Composite International Diagnostic Interview, and included a broad range of fear, distress, behavior, substance use, and other disorders. Disorder severity was measured with the Sheehan Disability Scale. Main Outcomes and Measures:Fluid IQ measured with the Kaufman Brief Intelligence Test, normed within the sample by 6-month age groups. Results:The sample included 10?073 adolescents (mean [SD] age, 15.2 [1.50] years; 49.0% female) with valid data on fluid intelligence. Lower mean (SE) IQ was observed among adolescents with past-year bipolar disorder (94.2 [1.69]; P?=?.004), attention-deficit/hyperactivity disorder (96.3 [0.91]; P?=?.002), oppositional defiant disorder (97.3 [0.66]; P?=?.007), conduct disorder (97.1 [0.82]; P?=?.02), substance use disorders (alcohol abuse, 96.5 [0.67]; P?

SUBMITTER: Keyes KM 

PROVIDER: S-EPMC5288266 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature