Table 3.

Multivariate analysis of predictors for pathologic complete response

Characteristic	OR	95% CI	p-value
Gender (male vs. female)	0.308	0.054–1.752	0.184
Initial CEA level (≤5 vs. >5 ng/dL)	0.970	0.180–5.233	0.972
Clinical T stage (T2 vs. T3, T4)	5.363	0.963–29.877	0.055
Interval from CCRT to operation (<7 vs. ≥7 wk)	0.139	0.022–0.877	0.036

OR, odds ratio; CI, confidence interval; CEA, carcinoembryonic antigen; CCRT, concurrent chemoradiotherapy.