ICU service in Taiwan

Table 2 Demographic characteristics of the study population

		Number	Age (year)	Male (%)	CMI	CCI
			Mean ± SD	Male (%)	Mean ± SD	Mean ± SD
						Median (IQR)
Year	2004	192,858	64.5 ± 18.0	60.8	2.12 ± 1.89	1.68 ± 1.91
	2004	192,858	64.5 ± 18.0	60.8	2.12 ± 1.89	1 (0–2)
	2005	202,788	64.7 ± 18.0	61.1	2.11 ± 1.85	1.65 ± 1.90
	2005	202,788	64.7 ± 18.0	61.1	2.11 ± 1.85	1 (0–2)
	2006	207,528	64.9 ± 18.0	61.0	2.14 ± 1.91	1.68 ± 1.93
	2006	207,528	64.9 ± 18.0	61.0	2.14 ± 1.91	1 (0–2)
	2007	212,160	65.4 ± 17.9	60.6	2.23 ± 1.97	1.68 ± 1.91
	2007	212,160	65.4 ± 17.9	60.6	2.23 ± 1.97	1 (0–2)
	2008	213,030	65.6 ± 17.8	61.2	2.29 ± 2.01	1.69 ± 1.92
	2008	213,030	65.6 ± 17.8	61.2	2.29 ± 2.01	1 (0–2)
P value for trend			<0.001	0.486	<0.001	0.025
Hospital	MC	354,631	61.8 ± 18.2*	61.6*	2.71 ± 2.54*	1.70 ± 2.08**
	MC	354,631	61.8 ± 18.2*	61.6*	2.71 ± 2.54*	1 (0–2)
	RH	488,683	65.4 ± 17.7**	60.9**	2.02 ± 1.61**	1.70 ± 1.90**
	RH	488,683	65.4 ± 17.7**	60.9**	2.02 ± 1.61**	1 (0–2)
	DH	185,050	70.4 ± 16.7	59.9	1.71 ± 1.15	1.57 ± 1.60
	DH	185,050	70.4 ± 16.7	59.9	1.71 ± 1.15	1 (0–2)
Total		1,028,364	65.0 ± 18.0	60.9	2.18 ± 1.93	1.68 ± 1.91
						1 (0–2)

MC medical centers, RH regional hospitals, DH district hospitals, SD standard deviation. IQR, interquartile range, CMI case mix index, CCI Charlson comorbidity index. *P < 0.001 vs. RH and DH; **P < 0.001 vs. DH.

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