title: A longitudinal study of drug and alcohol use by psychosis-prone and impulsive-nonconforming individuals.
abstract: The rates of substance use and abuse are higher among psychotic patients and antisocial individuals than in the general population. In a 10-year longitudinal study, psychosis-prone individuals identified by the Perceptual Aberration (L. J. Chapman, J. P. Chapman, M. L. Raulin, 1976) and Magical Ideation (Per-Mag) scales (M. Eckblad & L. J. Chapman, 1983), and individuals with antisocial traits, identified by the Impulsive Nonconformity (Noncon) scale (L. J. Chapman et al., 1984), exceeded a control group on rates of substance use disorders. As hypothesized, the Per-Mag group demonstrated preferential patterns of substance use similar to those reported for schizophrenic patients. Participants who scored deviantly on both the Per-Mag and Noncon scales were at especially heightened risk for substance use disorders. Psychosis proneness at the initial screening predicted substance abuse at the follow-up evaluation, but substance abuse at the initial interview did not predict later clinical psychosis or psychoticlike experiences.
authors.affiliation: Department of Psychiatry, University of Wisconsin--Madison 53792, USA.
authors.forename: T R
authors.initials: TR
authors.lastname: Kwapil
mesh_terms: D000328:Adult; D000437:Alcoholism / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology*; D015897:Comorbidity; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007175:Impulsive Behavior / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology*; D008137:Longitudinal Studies; D008297:Male; D010552:Personality Assessment; D011569:Psychiatric Status Rating Scales; D011618:Psychotic Disorders / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology*; D012307:Risk Factors; D012925:Social Conformity; D019966:Substance-Related Disorders / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology*