Table 1. Hedges g and SEs for Studies and Selected Individual- and Study-Level Variables.

Source	No. of patients at baseline	Age at baseline, y	Sex (male vs female), %	Delirium at baseline, %	Duration of follow-up, y	No. of covariates	Matching/adjustment at baseline	Attrition rate, %	g (SE)
Bickel et al,12 2008	180	73.8	31	23	3.2	4	Yes	9	2.04 (0.63)
Brown et al,13 2018	143	70	75	54	1.0	5	Yes	24	0.18 (0.17)
Davis et al,14 2012	558	88.3	20	13	10.0	3	Yes	1	1.05 (0.13)
Davis et al,15 2017	987	90a	31	28	5.2	4	Yes	0	0.22 (0.07)
Franck et al,16 2016	720	70	54	21	0.3	8	Yes	23	0.52 (0.25)
Fong et al,17 2009	408	73.9	43	18	1.4	8	Yes	0	0.47 (0.13)
Fong et al,18 2012	771	77.2	43	53	2.0	10	Yes	23	0.38 (0.13)
Girard et al,19 2018	964	62	60	69	1.0	8	Yes	35	0.15 (0.07)
Gross et al,20 2012	263	78.3	43	56	3.2	8	Yes	69	0.45 (0.13)
Inouye et al,21 2016	560	76.7	42	24	3.0	10	Yes	44	0.23 (0.1)
Kat et al,22 2008	112	82.7	NA	63	2.5	4	Yes	56	0.63 (0.2)
Krogseth et al,23 2016	287	85.7	26	70	0.4	1	Yes	30	0.33 (0.13)
Lingehall et al,24 2017	114	76.5	69	53	5.0	13	Yes	6	0.75 (0.19)
Lundström et al,25 2003	67	79.1	23	28	5.0	3	Yes	40	0.94 (0.4)
Mitchell et al,26 2018	148	57	69	19	0.5	9	No	47	0.12 (0.21)
Neerland et al,27 2017	387	84.5	24	32	0.8	4	Yes	31	1.05 (0.3)
Pandharipande et al,28 2013	821	61	51	75	1.0	9	Yes	43	0.5 (0.03)
Rockwood et al,29 1999	203	79	43	19	3.0	3	Yes	50	0.98 (0.33)
Rudolph et al,30 2008	1161	68.7	53	9	0.3	3	No	19	0.14 (0.19)
Saczynski et al,31 2012	225	73	76	46	1.0	8	Yes	0	0.26 (0.13)
Sauër et al,32 2017	184	67.1	72	13	1.0	3	Yes	21	0.67 (0.08)
Sprung et al,33 2017	1667	80	53	2	0.8	5	Yes	31	0.61 (0.28)
Vasunilashorn et al,34 2018	560	76.7	42	56	3.0	9	Yes	11	0.25 (0.09)
Wacker et al,35 2006	29	77.1	34	48	NA	0	No	0	1.03 (0.39)

Abbreviation: NA, not applicable.

^aMean age at baseline.