Table 1:

Description and summary of the included studies and quality assessment results

Ref. No.	Sample size(n)	Sc	SDd	Participants				Incidence of delirium (%)	Instrument of delirium assessment	Qh
	Da/N-Db			D		N-D
				Gender (M/F)	Age (M±SD or Median or n)	Gender (M/F)	Age (M±SD or Median or n)
(1)	133/33	MICU	Re	83/50	20–44: 17 45–64: 35 ≥65: 81	16/17	20–44: 8 45–64: 8 ≥65: 7	80.12	Nu-DESC	6
(7)	63/358	CSICU	R	NRf	NR	NR	NR	14.96	Nu-DESC	7
(8)	159/489	CSICU	R	85/74	65.7±11.70	305/184	59.4±12.90	24.54	CAM-ICU	5
(9)	23/170	NICU	Pg	9/14	71.09±12.18	78/92	61.43±13.63	11.92	Korean CAM-ICU	10
(12)	1398/2323	MICU SICU	R	777/621	pre-adolescence: 14 adolescence: 28 adult: 532 old: 824	1348/975	pre-adolescence: 15 adolescence: 61 adult: 1125 old: 1122	37.57	DOS	8
(23)	688/2596	MICU SICU	R	395/293	68.43±14.77	1915/1369	58.5±15.59	20.95	CAM-ICU	7
(24)	107/48	MICU	R	73/34	65.65±14.08	35/13	58.67±17.90	69.03	CAM-ICU	7
(25)	22/77	MICU SICU	R	18/4	76.00	57/20	72.00	22.22	CAM-ICU	6
(26)	180/720	MICU SICU	Re	82/98	73.37±11.97	424/296	59.65±15.18	20.00	CAM-ICU	7
(27)	63/51	ICU	Pf	26/25	65–74: 27 75–84: 21 ≥85: 3	19/44	65–74: 18 75–84: 23 ≥85: 22	55.26	Korean CAM-ICU	7
(28)	25/45	MICU	P	13/12	≥65: 17 ≤64: 8	23/22	≥65: 20 ≤64: 25	35.71	CAM-ICU	7
(29)	22/77	ICU	P	14/8	≥60: 16 ≤59: 6	44/33	≥60: 42 ≤59: 35	22.22	CAM-ICU	5
(30)	22/88	SICU	P	15/7	66.8±9.60	67/21	60.06±12.10	20.00	CAM-ICU	7
(31)	500/2000	MICU	R	204/296	67.29±15.31	879/1121	59.92±15.37	20.00	CAM-ICU	6
(32)	31/75	ICU	R	20/11	49.7±8.00	59/16	48.4±8.00	29.25	CAM-ICU	5
(33)	46/27	SICU	R	33/13	64.46±9.84	18/9	52.85±15.52	63.01	CAM-ICU	5
(34)	34/91	MICU SICU	R	18/16	71.50	46/45	60.00	27.20	CAM-ICU	6
(35)	107/68	ICU	R	63/44	72.07±13.25	32/36	59.85±17.45	61.14	CAM-ICU	7

^aD=Delirium,

^bN-D=Non-Delirium,

^cS=Setting,

^dSD=Study design,

^eR=Retrospective survey,

^fP=Prospective survey,

^gQ=Quality