Table 1.

Prevalence (per 1000 adolescents aged 12-18 years) of certain chronic conditions in mid-adolescence

	Prevalence
Musculoskeletal conditions:	41
Cerebral palsy	15
Skin conditions	32
Serious mental health problems:	120*
Anorexia or bulimia nervosa	15
Attention-deficit/hyperactivity disorder	100*
Diabetes:
Type 1	2
Type 2	1-2
Respiratory conditions:	150*
Asthma	100*
Cystic fibrosis	0.1
Epilepsy	4
Ear or hearing problems	18

^*Uncertain value owing to differences in disease definitions