Table 4.

Univariable and multivariable analysis for abdominal infection in all patients

	Univariable			Multivariable
	RR	95%CI	p-value	RR	95%CI	p-value
LPD vs. OPD	0.179	0.046–0.688	0.012	0.182	0.047–0.709	0.014
Gender	0.925	0.303–2.820	0.891
Age	1.009	0.950–1.072	0.766
BMI	1.151	0.949–1.397	0.153
Operation time	1.029	0.819–1.293	0.807
Duration of anesthesia	1.019	0.812–1.278	0.874
Intraoperative hemorrhage	1.002	0.999–1.005	0.187	1.002	0.999–1.005	0.235
ASA grade	1.059	0.345–3.251	0.921
Stage	0.292	0.064–1.342	0.292

RR relative risk, CI confidence interval