The study examined the ability of a six-item self-report screener, the Oregon Adolescent Depression Project Conduct Disorder Screener (OADP-CDS), to identify adolescents with a lifetime diagnosis of conduct disorder and to predict antisocial personality disorder by age 24. The study examined relevant scales from the Youth Self-Report and the Child Behavior Checklist for comparison purposes. A total of 1,709 high school students completed an initial questionnaire and diagnostic interview assessment; 1,507 participants returned approximately 1 year later for a second assessment. A third assessment was conducted with selected members of the second group (n=940) after they had turned 24 years of age. The OADP-CDS had good internal consistency, test-retest stability and screening properties. Differences in the screening ability of the OADP-CDS as a function of gender and social desirability were nonsignificant. The efficacy of the measure as a screener did not differ significantly from that of longer adolescent- and parent-report measures. The OADP-CDS was able to predict cases of antisocial personality disorder in young adulthood. Tables, figure, references