A substantial body of literature suggests that childhood maltreatment is related to negativeoutcomes during adolescence, including delinquency, drug use, teenage pregnancy, and schoolfailure. There has been relatively little research examining the impact that variation in thedevelopmental stage during which the maltreatment occurs has on these relationships, however. Inthis paper, we reassess the impact of maltreatment on a number of adverse outcomes whendevelopmentally specific measures of maltreatment—maltreatment that occurs only inchildhood, only in adolescence, or in both childhood and adolescence—are considered.Data are drawn from the Rochester Youth Development Study, a broad-based longitudinal studyof adolescent development. The analysis examines how maltreatment affects delinquency, druguse, alcohol-related problems, depressive symptoms, teen pregnancy, school dropout, andinternalizing and externalizing problems during adolescence. We also examine whether the type ofmaltreatment experienced at various developmental stages influences the outcomes. Overall, ourresults suggest that adolescent and persistent maltreatment have stronger and more consistentnegative consequences during adolescence than does maltreatment experienced only in childhood.