. Author manuscript; available in PMC: 2016 Nov 28.

Published in final edited form as: J Surg Res. 2014 Mar 19;190(1):170–176. doi: 10.1016/j.jss.2014.03.033

Table 4.

Multivariate logistic model with preoperative predictor variables at higher risk for SSI.

Variable	Odds ratio	95% Confidence interval	P value
Obesity (BMI > 30)	1.8	1.3, 2.5	0.001
Alcohol use	2.7	1.0, 7.4	0.049
Partially dependent	2.9	1.0, 8.2	0.049
Totally dependent	5.8	1.3, 26.5	0.024
Weight loss > 10%	2.8	1.0, 7.8	0.05
Steroids	2.1	1.0, 4.6	0.06
Central neck dissection	1.5	0.9, 2.5	0.14
Insulin-dependent diabetes	1.7	0.9, 3.3	0.09
Diabetes on oral agents	1.7	0.9, 3.0	0.08
COPD	1.7	0.8, 3.7	0.21

Variables also included in model that were clearly not associated with significant odds of predicting SSI were partial thyroidectomy, thyroidectomy with radical lymph node dissection, reoperative thyroidectomy, thyroidectomy with substernal goiter, underweight (BMI<19), diabetes not requiring medications, and history of CHF.