Table 3.

Overall univariate and multivariate survival analysis

Variable	Univariate p	Multivariate p	Hazard Ratio	95% Confidence interval of hazard ratio
Age (< 72 years versus ≥ 72 years)	0.03	0.003	2.38	1.339 to 4.224
Pre-operative radiotherapy	0.26	-	-	-
Anastomotic leak	0.23	-	-	-
Gender (Male versus female)	0.33	-	-	-
Site of tumour (Rectal versus colonic)	0.87	-	-	-
Emergency surgery	<0.0001	0.004	2.35	1.312 to 4.205
Atrial fibrillation	0.04	0.06	2.21	0.979 to 4.985
Dukes' stage (A, B, C, D)	<0.0001	<0.0001	Dukes A 0.09	0.032 to 0.267
			Dukes B 9.13	4.343 to 19.206
			Dukes C 0.15	0.073 to 0.312
			Dukes D 1	Reference