This study was designed to assess social, emotional, and behavioral functio
ning of children with chronic illness and to evaluate three models addressi
ng the impact of chronic illness on psychosocial functioning: discrete dise
ase, noncategorical, and mixed. Families of children with cancer, sickle ce
ll disease, hemophilia, and juvenile rheumatoid arthritis participated, alo
ng with families of classroom comparison peers without a chronic illness wh
o had the closest date of birth and were of the same race and gender (COMPs
). Mothers, fathers, and children provided information regarding current fu
nctioning of the child with chronic illness or the COMP child. Child Behavi
or Checklist and Children's Depression Inventory scores were examined. Resu
lts provided support for the noncategorical model. Thus, the mixed model ev
aluated in this study requires modifications before its effectiveness as a
classification system can be demonstrated.