Table 2.

Diagnoses found in the study population with Intellectual Disability (some people may have more than one diagnosis).

	Children		Adults
	N	%	N	%
Total study population with ID	15470	100	27706	100
Number (%) of people with ID with diagnosis	n	%	n	%
Down syndrome	1631	10.54	2488	8.98
Fragile X	342	2.21	304	1.10
Sturge-Weber	56	0.36	113	0.41
Tay-Sachs	7	0.05	86	0.31
Angelman	64	0.41	55	0.20
Williams	33	0.21	45	0.16
Rett	77	0.50	42	0.16
Gaucher	14	0.09	42	0.16
DiGeorge	149	0.96	40	0.14
Lennox-Gastaut	43	0.28	40	0.14
Cornelia de Lange	33	0.21	33	0.12
Laurence-Moon-Biedl	7	0.05	32	0.12
Sotos	58	0.37	27	0.14
Prader-Willi	19	0.12	23	0.08
Rubinstein-Taybi	27	0.17	16	0.06
Other genetic or congenital syndromes	409	2.64	394	1.42
Microcephalus	910	5.88	418	1.51
Other congenital malformations or abnormalities	641	4.14	636	2.30
Perinatal complications	118	0.76	200	0.72
Central nervous system infections	263	1.70	582	2.10
Acquired post-natal brain lesion	16	0.10	62	0.22
Epilepsy	2329	15.05	6115	22.07
Autism and Attention Deficit Disorder	2739	17.71	1864	6.73
Cerebral palsy	776	5.02	1248	4.50
None of the above	7171	46.35	15865	57.26