Comparison 1. Haloperidol versus placebo.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 The event rate of delirium	1	1439	Risk Ratio (M‐H, Random, 95% CI)	1.01 [0.87, 1.17]
2 In‐hospital mortality	2	1580	Risk Ratio (M‐H, Random, 95% CI)	0.98 [0.80, 1.22]
3 Coma‐and delirium‐free days ( 28 days)	2	1580	Mean Difference (IV, Random, 95% CI)	‐0.60 [‐1.37, 0.17]
4 Length of ICU stay	2	1580	Mean Difference (IV, Random, 95% CI)	0.18 [‐0.60, 0.97]