TABLE 5.

Conventional meta-analyses of the different risk factors for acquisition and transmission of carbapenem-resistant P. aeruginosa^a

Risk factor	No. of factors	Pooled OR (random effects)	95% CI	Range of OR in individual studies	Risk of publication bias
					Egger	P value	Kendall's tau	P value
Carbapenem use	16	7.09	5.43–9.25	3.6–76.0	1.39	0.02	0.47	0.01
Medical devices	19	5.11	3.55–7.37	2.1–64.3	2.30	<0.001	0.49	0.003
Other antibiotic use	19	3.56	2.52–5.03	0.3–43.7	1.49	0.06	0.38	0.02
ICU admission	8	3.02	1.62–5.61	1.1–13.3	2.96	0.002	0.07	0.90
Quinolone use	11	2.73	1.27–5.87	0.1–48.4	0.89	0.56	0.45	0.06
Underlying disease	13	2.44	1.23–4.84	0.1–25.0	1.34	0.06	−0.05	0.77
Vancomycin use	3	2.10	1.42–3.09	1.8–2.9	NC	NC	NC	NC
Patient characteristics	13	1.46	1.22–1.75	1.0–13.9	2.02	<0.001	0.56	0.007
Length of hospital stay	9	1.06	1.02–1.09	1.0–6.7	3.05	0.0003	0.56	0.04

^aOR, odds ratio; CI, confidence interval; NC, not calculated because there were too few strata.