Table 4.

Risk factors for extended-spectrum β-lactamase-producing Gram-negative bacilli acquired infection in 207 patients with acquired infection

Variable	Univariate			Multivariate
	OR	95% CI	p value	OR	95% CI	p value
Age > 65 years	2.99	0.92–9.72	0.07	3.17	0.92–10.87	0.07
Simplified Acute Physiology Score II > 40	1.82	0.49–6.68	0.90
Male	1.35	0.36–4.96	0.44
Surgical reason for admission	0.82	0.17–3.85	0.80
Intubation duration > 48 h	1.16	0.25–5.40	0.85
ESBL-GNB colonization	9.18	2.83–29.77	< 0.001	9.61	2.86–32.29	< 0.001

95% CI, 95% confidence interval; ESBL-GNB, extended-spectrum β-lactamase-producing Gram-negative bacilli