Number of pairs of disagreement between paediatricians and parents of chronically ill children (ALL, asthma, CF, and JIA) for the HUI3 attributes speech, ambulation, emotion, and pain/discomfort. The HUI3 attribute levels of the parents were subtracted from the levels of the paediatricians. The positive bars represent the number of pairs for each attribute where the paediatrician scored a higher level of impairment within attributes than the parent at baseline (1; black) and at follow up (2; dark grey). The negative bars represent the number of pairs where the parent scored a higher level of disturbances within attributes than the paediatrician at baseline (1; grey) and at follow up (2; white).