Childhood externalizing symptoms as predictors of adult depressive disorders. Boxes reflect weights of individual predictors. Effect sizes were combined within cohorts; combined effect sizes are in bold and represented by diamonds. NCDS = National Child Development Study, CNUS = Community in Northeast US, FBM = Finnish Boy to Man, GSM = Great Smoky Mountains, SSDP = Seattle Social Development Project, ZHLS = Zuid-Holland Longitudinal Study, CCLS = Columbia County Longitudinal Study, CHDS = Christchurch Health and Development Study, aggr. = aggression, CI = confidence interval, CP = conduct problems, OD = oppositional defiant symptoms.