Avoidable mortality among child welfare recipients and intercountry adoptees: a national cohort study.

OBJECTIVE To compare rates of avoidable mortality in adolescence in child welfare recipients and intercountry adoptees with the general population. DESIGN A register study of the entire national cohort of 989 871 Swedish residents born 1973-82 in the national census of 1990. Multivariate Cox analyses of proportional hazards were used to analyse avoidable deaths between 13 to 27 years of age during 1991-2000. PARTICIPANTS 12 240 intercountry adoptees, 6437 foster children, 15 868 subjected to other forms of child welfare interventions, and the remaining 955 326 children in the cohort. RESULTS Intercountry adoptees had a high sex and age adjusted relative risk (RR) for suicide death only (RR 3.5; 95% CI 2.3 to 5.0) in comparison with the general population, while foster children and adolescents who had received other kinds of child welfare interventions had high sex and age adjusted RRs for suicide death; 4.3 (2.8 to 6.6) and 2.7 (1.9 to 3.9) respectively, as well as for other avoidable deaths; RRs 2.5 (1.6 to 3.7) and 2.8 (2.1 to 3.6). The RRs of avoidable deaths for foster children and other child welfare recipients decreased considerably when compared with youth brought up in homes with similar psychosocial characteristics as their original home. CONCLUSION Children in substitute care in early childhood were at particular risk for suicide death in adolescence and young adulthood. Child welfare interventions were insufficient to prevent excess deaths in children at risk.