Table 5.

Predictors of Extra-Abdominal Infection after Intra-Abdominal Infection

Factor	Wald statistic	Exp (β)	95% CI for Exp (β)	p value
APACHE II score (per point)	121.5	1.08	1.07–1.10	<0.001
Number of days of antimicrobial therapy for IAI (per day)	60.3	1.04	1.03–1.05	<0.001
Hospital-acquired IAI	23.8	1.82	1.43–2.32	<0.001
ICU status at time of IAI	12.7	2.00	1.27–2.92	<0.001
Organ transplant	10.5	0.62	0.47–0.83	0.001
Days, admission to IAI (per day)	9.8	1.02	1.01–1.04	0.002

APACHE II=Acute Physiology and Chronic Health Evaluation II; CI=confidence interval; IAI=intra-abdominal infection; ICU=intensive care unit.