Comparison 2. Subgroup analysis.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Response to treatment ‐ each low‐potency antipsychotic separately	13	558	Risk Ratio (M‐H, Random, 95% CI)	1.10 [0.85, 1.42]
1.1 versus chlorpromazine	7	290	Risk Ratio (M‐H, Random, 95% CI)	1.31 [0.97, 1.77]
1.2 versus levomepromazine	2	80	Risk Ratio (M‐H, Random, 95% CI)	0.86 [0.50, 1.49]
1.3 versus perazine	1	32	Risk Ratio (M‐H, Random, 95% CI)	1.13 [0.62, 2.08]
1.4 versus thioridazine	3	156	Risk Ratio (M‐H, Random, 95% CI)	0.78 [0.31, 1.97]
2 Response to treatment ‐ treatment resistance	13	558	Risk Ratio (IV, Random, 95% CI)	1.10 [0.85, 1.42]
2.1 not treatment resistant	11	499	Risk Ratio (IV, Random, 95% CI)	1.16 [0.89, 1.51]
2.2 treatment resistant	2	59	Risk Ratio (IV, Random, 95% CI)	0.91 [0.38, 2.17]