Table 2. Univariate survival analyses of CRC patients according to various clinicopathological variables.

Variable	n	5-year CCSS (%)	Log rank χ2 test		P
Years of diagnosis			333.65	P<0.001
1988–1993	16017	70.9%
1994–1999	21295	74.6%
2000–2003	32523	78.3%
Sex			105.86	P<0.001
male	37130	74.4%
female	32705	76.7%
Age			35.84	P<0.001
≤40	3014	78.6%
41–74	66821	75.3%
Race			195.16	P<0.001
Caucasian	55824	76.0%
African American	7390	69.3%
Others*	6621	78.1%
Primary site			144.24	P<0.001
Colon cancer	51372	76.1%
Rectal cancer	18463	73.6%
Pathological grading			1128.17	P<0.001
High/Moderate	54812	78.3%
Poor/undifferentiation	12644	63.5%
Histological Type			584.49	P<0.001
Adenocarcinoma	61384	76.3%
Mucinous cancer	7804	71.7%
Signet-ring cancer	647	42.6%
AJCC stage			7353.52	P<0.001
I	4563	96.2%
II	35867	85.4%
III	29405	60.1%
No. of LNs dissected			36.93	P<0.001
<12	37653	74.7%
≥12	32182	76.3%
Metastasis LNR			11590.57	P<0.001
rN0(0)	40546	86.6%
rN1(0.01–0.20)	12814	72.3%
rN2(0.21–0.60)	11482	56.3%
rN3(>0.60)	4993	36.8%

*including other (American Indian/AK Native, Asian/Pacific Islander) and unknowns.