Ferdinand, R.F.

problem disorder children anxiety study score child scale behavior level adolescent sample parent cortisol psychiatry group association symptom effect depression suicide difference journal suicide ideation internalizing childhood verhulst health adult syndrome psychopathology cortisol levels pdd-no ideation research analyses externalizing signi outcome dsm-iv result adolescent psychiatry individual table assessment anxiety problems adolescence stress population factor achenbach depressive adulthood model anxiety disorder criteria class anxiety disorders life events information affective interview problem scores externalizing problems interaction ferdinand subject diagnose participant gender internalizing problems measure female attention questionnaire control number predictor dutch adversity