Table 4.

Univariate and multivariate survival analyses evaluating the number of retrieved LNs influencing GCSS based on different cancer stage.

		Univariate analysis		Multivariate analysis
Variable	5-year GCCS	Log rank χ2 test	P	HR(95%CI)	P
pN Stage
N1		305.678	<0.001		<0.001
No. of LNs
≤6	23.1%			Reference
7-14	44.3%			0.581(0.511-0.661)
≥15	58.1%			0.373(0.325-0.427)
N2		200.635	<0.001		<0.001
No. of LNs
≤6	13.6%			Reference
7-14	29.2%			0.582(0.507-0.669)
≥15	40.7%			0.406(0.352-0.469)
N3		29.113	<0.001		<0.001
No. of LNs
≤6
7-14	10.8%			Reference
≥15	18.3%			0.789(0.719-0.865)

P values were adjusted for age, race, location, pathological grading, histotype stage and tumor stage as covariates.

NI: not included in the multivariate survival analysis.