Table 3.

Differences in cumulative survival rates among the 31 N(−) CRC patients according to the current survival status and the cutoff number of TDLNs (NDLNs) of 15

Part I	Current survival status
	Dead (n = 3)	Alive (n = 28)	p value
No. of TDLNs (=NDLNs) (mean ± SD)	13.0 ± 12.3	20.7 ± 11.5	0.181*
Follow-up periods (mean ± SD)(month)	57.1 ± 59.7	89.8 ± 33.9	0.316*
Cumulative survival rate (%)
1 year	67.7%	100.0%
2 years	67.7%	100.0%
5 years	33.3%	100.0%
10 years	33.3%	100.0%
12 years	0.0%	100.0%
Part II	TDLNs (=NDLNs)
	≤ 15 (n = 14)	> 15 (n = 17)	p value
No. of deaths (n = 3)	2	1	0.431**
Follow-up periods (mean ± SD) (month)	87.5 ± 41.4	86.0 ± 43.2	0.912*
Survivals (mean, 95%CI) (month)	117.0 (99.3–134.7)	131.6 (120.4–142.8)	0.529***
Cumulative survival rate (%)
1 year	92.3%	100.0%
2 years	92.3%	93.8%
5 years	92.3%	93.8%
10 years	92.3%	93.8%
12 years	61.5%	93.8%

CRC colorectal cancer, No. number, TDLNs total dissected lymph nodes, NDLNs negative dissected lymph nodes, SD standard deviation, CI confidence interval

*Student’s t test/Mann–Whitey U test

**Chi-square test

***Log-rank