With respect to missing data, participants included in the unconditional analysis (n = 443) did not differ significantly from those excluded on the basis of having no relevant externalizing data (n = 34) in terms of maternal-reported externalizing behavior at the study’s inception (i.e., age 5), t(461) = −.49, p = .63, or in the year immediately preceding the present study’s initial assessment (i.e., age 11), t(373) = .79, p = .43. Similarly, no differences were observed on age 11 ratings of peer antisocial behavior, t(2.002) = .90, p = .47.
