Subcutaneous fat thickness and abdominal depth are risk factors for surgical site infection after gastric cancer surgery

Table 2 Risk factors for surgical site infection in univariate and multivariate analysis

Variable	Univariate analysis	P value	Multivariate analysis	P value
	OR (95%CI)		OR (95%CI)
Age (yr)	1.011 (0.977–1.047)	0.528
Male	0.905 (0.440–1.858)	0.785
BMI (kg/m2)	1.259 (1.133–1.398)	< 0.001	-	-
SFT (mm)	1.137 (1.186–1.192)	< 0.001	1.150 (1.090–1.214)	< 0.001a
AD (mm)	1.031 (1.017–1.046)	< 0.001	1.024 (1.009–1.040)	0.002a
Smoking	1.572 (0.792–3.123)	0.196
Alcohol use	1.431 (0.679–3.015)	0.346
Diabetes	1.996 (0.885–4.500)	0.096
Laparoscopic-assisted surgery	0.403 (0.164–0.991)	0.048	0.286 (0.03–0.797)	0.017a
Hypertension	0.992 (0.484–2.034)	0.984
Type of resection
Total gastrectomy	1.395 (0.671–2.900)	0.373
Operation time (min)	1.008 (1.002–1.015)	0.010	1.008 (1.001–1.015)	0.030a
Blood loss (mL)	1.000 (0.999–1.002)	0.659
History of laparotomy	1.210 (0.505–2.894)	0.669
Albumin (g/dL)	1.041 (0.971–1.116)	0.258
Prealbumin (g/dL)	1.002 (0.996–1.001)	0.508
TNM stage
I	–	–
II	1.629 (0.709–3.743)	0.250
III	0.942 (0.396–2.241)	0.892

^aP < 0.05.

BMI: Body mass index; SFT: Subcutaneous fat thickness; AD: Abdominal depth.