ABSTRACT. Objective. Relatively little is known about the longer-term impact of traumatic brain injury (TBI) on children's daily functioning, especially the broader outcome domain referred to as health-related quality of life (HRQL). The objective of the present study was to examine the nature and predictors of HRQL outcomes in children with moderate to severe TBI an average of 4 years postinjury.Methods. The study used a concurrent cohort-prospective design involving postinjury assessments of 3 groups of traumatically injured children and their families including 42 with severe TBI, 42 with moderate TBI, and 50 with orthopedic injuries only. Parent and child perceptions of HRQL and child adaptive behavior measures were obtained along with parent descriptions of the child's health problems and use of medical and mental health services. Predictors included indices of injury severity, social factors, and ratings of preinjury child behavior problems and school performance.Results. Based on parent report, adolescents who sustained severe TBI had lower HRQL related to overall psychosocial functioning and in the domains of behavior, mental health, general health, and family impact than adolescents who sustained orthopedic injuries only. Communication skills, daily living skills, and general adaptive functioning also were rated lower in the severe TBI group. In contrast to parent reports, adolescents with severe TBI did not rate their HRQL in most domains differently than did adolescents with orthopedic injuries. There were no group differences in frequency of persistent physical limitations. Sixty-seven percent of families of children with severe TBI used mental health counseling at some point after the injury. Risks for poorer HRQL outcomes were related to family social disadvantage and poorer preinjury child behavioral and academic functioning.Conclusions. Findings underscore the importance of using comprehensive measures of HRQL, along with traditional indicators of functional outcomes, when evaluating the longer-term impact of injuries in children. Identification of predictors suggests the need for close monitoring and intervention of high-risk children. Pediatrics 2002;109(2). URL: http://www. pediatrics.org/cgi/content/full/109/2/e34; traumatic brain injury, health-related quality of life, functional outcomes.ABBREVIATIONS. TBI, traumatic brain injury; HRQL, healthrelated quality of life; CNS, central nervous system; GCS, Glasgow Coma Scale; MISS, Modified Injury Severity Score; SCI, Socioeconomic Composite Index; FAD, Family Assessment Device; FAD-GF, Family Assessment Device General Functioning Scale; CHQ, Child Health Questionnaire; SD, standard deviation; WHO, World Health Organization; CBCL, Child Behavior Checklist; TRF, (Child Behavior Checklist) Teacher's Report Form; OR, odds ratio; CI, 95% confidence interval; SE, standard error. S tudy of the functional status of children with traumatic brain injury (TBI) is justified by both the prevalence of the condition and the multifaceted nature of injury sequel...