Table 2.

Cox regression model analysis for prediction of early tumor recurrence

Variables		Estimate (SE)	Hazard ratio	95% CI	P-value
Node status	Positive (vs. negative)	0.92134 (0.07919)	2.513	2.151-2.935	<.0001
T factor	T3 (vs. T2/T1)	0.73711 (0.16802)	2.090	1.504-2.905	<.0001
	T4 (vs. T2/T1)	1.15236 (0.17229)	3.166	2.258-4.437	<.0001
Adjuvant therapy	Yes (vs. no)	-0.15969 (0.08128)	0.852	0.727-1.000	0.0495
Gender	Male (vs. female)	0.16323 (0.07533)	1.177	1.016-1.365	0.0302
Age	≥60 years (vs. <60 years)	0.14509 (0.07541)	1.156	0.997-1.340	0.0543
Tumor gradeA	Low (vs. high)	-0.22072 (0.14021)	0.802	0.609-1.056	0.1154
Complication	Yes (vs. no)	0.13746(0.0990)	1.147	0.945-1.393	0.1650
Tumor location	Left sideB (vs. A-colon)	-0.13823 (0.08479)	0.871	0.738-1.028	0.1030
	T-colon (vs. A-colon)	-0.20106 (0.13829)	0.818	0.991-1.334	0.1460
Lymph node dissectionC	D2 (vs. D3)	0.13959 (0.07598)	1.150	0.624-1.072	0.0662

^ATumors were divided pathologically into two categories (see text for details).

^BLeft side colon, including the ascending colon, sigmoid colon and rectosigmoid colon.

^CFor details of the extent of lymph node dissection, refer to text. However, the extent of D3 dissection is greater than that of D2 dissection.

A-colon, ascending colon; T-colon, transverse colon; CI, confidence interval.