Table 2.

Multivariate analysis of risk factors associated with surgical site infection

Factors	OR	95%CI		P value
The history of diabetes	5.698	3.305	9.825	0.001
The use of antibiotic	14.977	2.865	78.299	0.001
NRS 2002 ≥ 3	2.426	1.199	4.909	0.014
NNIS ≥ 2	2.362	1.019	5.476	0.045
PCT ≥ 0.05 μg/L	1.687	1.056	2.695	0.029
LDL < 3.37 mmol/L	1.719	1.039	2.842	0.035
General anesthesia	3.334	1.134	9.806	0.029
Blood loss ≥ 200 mL	29.026	13.751	61.266	< 0.001
Surgical site
Uterus	Ref.
Gastrointestinal	3.646	1.097	12.121	0.035
Appendix	23.056	6.944	76.548	< 0.001
Kidney	6.256	1.377	29.361	0.020
Groin	53.589	10.354	277.357	< 0.001
Incision
I	Ref.
III	11.226	1.689	74.630	0.012
Season
Spring	Ref.
Summer	18.948	9.537	37.648	< 0.001
Autumn	2.648	1.454	4.823	0.001
Winter	0.481	0.266	0.872	0.016

PCT: Procalcitonin; LDL: Lipoprotein cholesterol; NNIS: National Nosocomial Infections Surveillance; NRS 2002: Nutritional Risk Screening 2002; OR: Odds ratio; CI: Confidence interval.