Table 2.

Univariable analysis of overall and disease‐free survival

		Overall survival			Disease‐free survival
		n	Median(months)	P †	n	Median (months)	P †
Age (years)	< 55	76	101	0·155	75	18	0·941
	≥ 55 and < 65	103	80		101	18
	≥ 65 and < 75	108	53		108	14
	≥ 75	66	40		66	13
Sex	F	129	106	0·059	126	22	0·049
	M	224	58		224	15
Site of primary tumour	Colon	237	65	0·483	234	16	0·618
	Rectum	115	74		115	16
Temporal relationship	Synchronous	180	48	0·073	177	11	0·004
	Metachronous	173	95		173	23
Dukes' class	A/B	112	68	0·291	111	23	0·205
	C	216	60		215	15
Primary surgery complication	No	297	68	0·082	296	18	0·088
	Yes	234	48		34	11
Preoperative chemotherapy	No	97	68	0·624	96	23	0·111
	Yes	255	65		253	13
Resection type	Anatomical	189	48	0·004	187	15	0·045
	Non‐anatomical	164	141		163	18
Pringle manoeuvre	No	47	106	0·932	46	21	0·336
	Yes	272	65		270	16
Tumour size (cm)	< 2·5	131	74	0·008	131	18	0·145
	≥ 2·5 and < 5·0	123	80		122	17
	≥ 5·0 and < 10·0	83	39		81	10
	≥ 10·0	16	36		16	14
No. of tumours	Solitary	170	82	0·019	170	24	< 0·001
	Multiple	183	49		180	11
Duration of surgery (h)*	≤ 2	93	(37)	0·013	93	19	0·157
	> 2 and ≤ 3	99	101 (30)		98	15
	> 3 and ≤ 4	79	53 (26)		77	13
	> 4	50	46 (18)		50	13
Estimated blood loss (ml)	< 100	89	101	0·078	89	18	0·126
	≥ 100 and < 200	88	106		87	23
	≥ 200 and < 400	81	60		80	15
	≥ 400	81	46		80	10
Blood transfusion	No	328	72	0·004	325	16	0·285
	Yes	21	31		21	16
Hospital stay (days)	≤ 7	176	92	0·014	173	21	0·030
	> 7 and ≤ 14	146	52		146	13
	> 14	28	46		28	9
Complications	None or minor	296	79	0·007	293	18	0·056
	Major	57	38		57	11
Resection margin	R0	295	80	0·011	293	18	0·027
	R1	58	43		57	11

^*Values in parentheses represent the 25 per cent quantile as the median was not reached during the study period for all groups.

^†Log rank test.