Objective: Siblings of children with chronic illness or disability have been reported to have a 1.6 to 2.0 risk for behavioral and mental health problems. Our objective was to examine the effects of an intervention for siblings (age 7-15 years) of children with chronic illness or disability.
Method: A randomized, three-group repeated-measures design was used: full intervention (n=79), partial intervention (n=71), and a waiting list control group (n=102). Outcomes were sibling knowledge about illness, behavior problems, social support, self-esteem, attitude, and mood measured over four postintervention periods. Covariates were family cohesion, maternal mood, socioeconomic status, and well sibling age. The full intervention included structured teaching and psychosocial sessions at a 5-day residential summer camp. The partial intervention included camp only. Treatment effects were estimated by using generalized estimating equation panel analyses.
Results: The full treatment group showed significant improvements on all six outcomes over most periods, the partial treatment group on three outcomes, and the control group on two outcomes. Improvements in outcomes ranged from 5% to 25% increases over baseline measures.
Conclusions: A dose-response relationship to intervention was found. Treatment gains were sustained over a period of 12 months.