Table II.

Univariate logistic regression analysis.

Variable	B	SE	P-value	OR (95% CI)
Gender (male)	−0.506	0.328	0.123a	0.603 (0.317–1.147)
Age (years)
<40	0.104	0.610	0.864	1.110 (0.336–3.668)
40–60	−0.101	0.317	0.751	0.904 (0.486–1.684)
>60b			0.919
Smoking	0.373	0.307	0.225a	1.452 (0.795–2.649)
Alcohol consumption	0.000	0.305	0.998	0.999 (0.550–1.817)
Location
Buccal mucosa	0.161	0.486	0.740	1.175 (0.453–3.044)
Tongue	−0.074	0.364	0.839	0.929 (0.455–1.897)
Gingiva	0.067	0.465	0.886	1.069 (0.429–2.662)
Other sitesb			0.972
Tumor size (cm)
<2b			0.800
2–4	−0.220	0.354	0.535	0.803 (0.401–1.606)
≥4	−0.027	0.517	0.959	0.974 (0.353–2.682)
Differentiated type
Wellb			0.882
Moderately	20.148	1.271×104	0.999	0.562 (0.000–5.347)
Poorly	0.554	1.107	0.617	1.741 (0.199–15.226)
TNM
Ib			0.129a
II	−0.357	0.471	0.448	0.700 (0.278–1.762)
III	0.799	0.551	0.147a	2.222 (0.755–6.545)
IV	0.216	0.449	0.631	1.241 (0.514–2.994)
Lymphatic metastasis	1.120	0.369	0.002a	3.064 (1.487–6.313)

^aP<0.25

^breference category; B, beta; SE, standard error; OR, odds ratio; CI, confidence interval; TNM, tumor-node-metastasis.