Adolescents (ages 13-17) were interviewed between February 2001 and January 2004 in dual-frame household and school samples described elsewhere (Kessler et al., 2009a; Kessler et al., 2009b). The household sample included 904 adolescents (879 in school, 25 dropouts) from households in the National Comorbidity Survey Replication (NCS-R) (Kessler & Merikangas, 2004). The school sample included 9,244 adolescents from a representative sample of schools in the adult sample areas of that survey. The conditional adolescent response rate was 86.8-82.6% (household and school samples, respectively). The household sample includes school dropouts and adolescents residing in areas where schools refused to participate. A high (72.0%) percent of initially-selected schools refused to participate and were replaced with matched replacement schools. Comparison of household sample respondents from nonparticipating schools with school sample respondents from replacement schools found no evidence of bias in estimates of either disorder prevalence or correlates (Kessler et al., 2009a).
