Table 1.

Groups of disabling chronic conditions (DCC) and included conditions

DCC group	Number of included studies	Number of affected children	Conditions included in the group
All-cause disabling chronic conditions	29 studies1 2 8–30	76226* affected children	Combined categories of all chronic conditions with associated activity limitation, including physical, sensory and psychological disabilities or long-term health problems
Psychological disorders	72 studies11 16 18 31–94	72277* affected children	All-cause psychological disorder, attention deficit hyperactivity disorder, autistic spectrum disorder, emotional disorder, oppositional defiant disorder, conduct disorder, internalising and externalising behaviour problems, obsessive compulsive disorder, chronic fatigue syndrome
Intellectual disability	25studies,52 60 69 71 84 95–113	633235* affected children	Children with IQ <70 or equivalent measure—7 of these studies report mild and moderate/severe disability
Sensory impairments	12 studies11 51 71 84 88 112 114–119	11994* affected children	Hearing impairment and visual impairment
Cerebral palsy	8 studies84 120–126	16084 affected children	Non-acquired and acquired cerebral palsy
Epilepsy	9 studies11 31 104 112 127–131	13562* affected children	Recurrent epileptic seizures excluding febrile seizures
Asthma	13 studies11 51 132–141	6407 affected children	Asthma with activity limitation and/or asthma requiring hospital admission
Congenital anomalies identifiable at birth	14 studies110 142–153	41956* affected children	Neural tube defects compatible with life, cleft lip and palate, other congenital and chromosomal abnormalities
Miscellaneous conditions (insufficient numbers for meta-analysis)	4 studies85 104 112 154	8954 children	Crohn's disease, Down's syndrome, diabetes mellitus, heart disease

*Indicates incomplete totals as some studies reported no data on number of participants.