Table 1.

Cohort characteristics

	ID cohort	Non-ID cohort
Total number (%)	9039 (21)	34 242 (79)
Male, n (%)	5279 (58)	18 825 (55)
Average age, years (SD)	42 (16)	44 (16)
Townsend score, n (%)
1	1403 (16)	4860 (14)
2	1752 (19)	5119 (15)
3	1948 (22)	6481 (19)
4	1942 (22)	8189 (24)
5	1563 (17)	7911 (23)
Missing	417 (5)	1619 (5)
History of antipsychotic use at cohort entry, n (%)	6684 (74)	16 227 (47)
History of movement disorder at cohort entry, n (%)	2192 (24)	4946 (14)
History of movement disorder without antipsychotic use at cohort entry, n (%)	136/2355 (6)	1038/18 015 (6)
History of movement disorder and antipsychotic use at cohort entry, n (%)	2056/6684 (31)	3908/16 227 (24)
Total person-years between first and last antipsychotic prescription	44 696	104 014
Median years between first and last prescription (IQR)	3.5 (1.2 to 7.9)	1.3 (0.19 to 4.4)
Median years on treatment between first and last prescription (IQR)	2.6 (0.76 to 6.3)	0.67 (0.15 to 2.5)
Average daily dose, CLZE (SD)	135 (156)	139 (146)

CLZE, chlorpromazine equivalents; ID, intellectual disability.