Assessed patterns of stress in families of children with pediatric conditions that varied on 2 dimensions: (a) fatal vs. nonfatal outcome and (b) presence vs. absence of cognitive impairment. Families of children with cystic fibrosis (n = 23), diabetes (n = 24), and moderate mental retardation (n = 24) were compared to families of well children (n = 24) in 3 age groups. Maternal responses to a multidimensional measure of family stress, the Questionnaire on Resources and Stress--Short Form (QRS-S), indicated that families of children with chronic conditions did not differ from families of well children on scales assessing generic aspects of family stress, such as family conflict. However, diagnostic groups differed on QRS-S scales assessing stressors specific to the child's disability (e.g., families of children with mental retardation were characterized by concerns about caring for the child as an adult). There was no evidence of higher levels of stress for families of older children. Data on the internal consistency of QRS-S scales and their relation to measures of maternal and child adjustment are presented.