Table 3.

Results of meta-analysis and fixed model

Variable	Group	No. of studies	Effect size and 95% interval			Test of null (2-tail)			Heterogeneity
			Point estimate	Lower limit	Upper limit	Z value	P value	Q value	df (Q)	P value	I2
Mortality	1	2	0.59	0.32	1.07	-1.72	0.085	0.70	1	0.404	0.000
	2	3	0.78	0.63	0.97	-2.27	0.023	3.20	2	0.202	37.486
	3	2	0.84	0.56	1.27	-0.81	0.419	1.55	1	0.213	35.385
	4	2	0.83	0.51	1.37	-0.73	0.468	1.63	1	0.201	38.819
IC	4	2	1.05	0.59	1.88	0.18	0.856	0.01	1	0.905	0.000
Colonization	4	2	0.35	0.22	0.55	-4.54	0.000	0.06	1	0.813	0.000
	2	2	0.068	0.009	0.543	-2.54	0.011	0.09	1	0.768	0.000
IC-associated mortality	3	2	0.163	0.024	1.089	-1.87	0.061	0.43	1	0.513	0.000