Table 3. Independent predictors of ECS in multivariate logistic regression analysis.

Variables	OR	95% CI	P-value
Age	—	—	NS
Gender	—	—	NS
Alcohol habit	—	—	NS
Smoking habit	—	—	NS
Pathological T stage	—	—	NS
Cellular differentiation	—	—	NS
Mode of invasion	—	—	NS
Number of positive nodes	9.400	2.136–41.370	0.003
CCND1 numerical aberration	—	—	NS
EGFR numerical aberration	8.206	1.631–41.295	0.011

Abbreviations: CI=confidence interval; ECS=extracapsular spread; NS=not significant; OR=odds ratio.