Table 2.

Frequency of antipsychotic drugs prescribed in the ID and non-ID cohorts

Antipsychotic drug	ID cohort				Non-ID cohort
	Number	Percentage	Average daily dose, mg	Median treatment duration, years	Number	Percentage	Average daily dose, mg	Median treatment duration, years
Risperidone	4013	28.5	1.9	1.81	7426	14.7	2.2	0.47
Olanzapine	2086	14.8	8.2	1.62	10 246	20.3	8.5	0.67
Chlorpromazine	1770	12.6	78.5	1.12	5274	10.5	64.8	0.20
Quetiapine	1295	9.2	154.1	0.93	7693	15.2	152.6	0.72
Haloperidol	1231	8.7	4.9	0.68	3755	7.5	3.2	0.14
Thioridazine	838	6.0	77.9	0.82	2672	5.3	49.8	0.20
Aripiprazole	661	4.7	10.5	0.74	2638	5.2	11.8	0.54
Trifluoperazine	456	3.2	6.5	1.06	3403	6.8	4.5	0.19
Zuclopenthixol	429	3.1	18.7	2.17	340	0.7	20.0	0.45
Amisulpride	327	2.3	295.0	0.94	1687	3.4	290.3	0.73
Promazine	276	2.0	58.4	0.33	1688	3.4	58.6	0.16
Sulpiride	276	2.0	437.8	1.97	1199	2.4	435.6	0.79
Other*	980	7.0	–	–	5230	10.4	–	–

*Other antipsychotic drugs prescribed to <1% of ID cohort each.

ID, intellectual disability.