Table 2.

Effect of adequate lymphadenectomy in univariate and multivariate Cox regression analyses for prediction of overall survival, stratified according to the receipt of neoadjuvant chemotherapy.

	HR	95% CI Lower	95% CI Upper	p
Univariate analysis: ≥10 vs. <10 LN
all patients	0.748	0.577	0.970	0.028
no NAC	0.713	0.541	0.941	0.017
NAC	0.980	0.455	2.111	0.959
Multivariate analysis: ≥10 vs. <10 LN
all patients	0.714	0.549	0.930	0.012
no NAC	0.718	0.542	0.952	0.021
NAC	0.882	0.329	2.364	0.804
Univariate analysis: ≥15 vs. <15 LN
all patients	0.742	0.583	0.945	0.015
no NAC	0.729	0.564	0.943	0.016
NAC	0.764	0.370	1.577	0.466
Multivariate analysis: ≥15 vs. <15 LN
all patients	0.754	0.590	0.963	0.024
no NAC	0.759	0.585	0.983	0.037
NAC	0.695	0.296	1.628	0.402

HR: Hazard ratio; NAC: neoadjuvant chemotherapy; LN: lymph nodes; CI: confidence interval.