Dose surgical sub-specialization influence survival in patients with colorectal cancer?

Table 1 Basic demographic data for the study groups of patients with colorectal cancer

Number	362	137	475
Mean age-years	69 (± 12)	70 (± 11)	69 (± 13)
Age range-years	29 to 93	38 to 93	32 to 95
Sex ration M:F	1.3:1	1.4:1	1.4:1
ASA score of 3 or 4	40%	39%	22%
Elective vs emergency	319 vs 43	112 vs 25	394 vs 81
procedures	(88% vs 12%)	(78% vs 18%)	(79% vs 17%)
Curative vs palliative	264 vs 80	101 vs 23	366 vs 85
pesections	(73% vs 22%)	(74% vs 17%)	(77% vs 18%)
No surgery	18 (5%)	13 (9%)	24 (5%)
Colon cancer	170 (47%)a	90 (66%)	314 (66%)
Rectal cancer	192 (53%)b	47 (34%)	161 (34%)
Adjuvant chemotherapy	116 (32%)c	19 (14%)	17 (4%)
Adjuvant radiotherapy	65 (18%)d	9 (7%)	14 (4%)
Mean follow-up-years	2.75 (± 1.2)e	4.5 (± 1.4)	5.1 (± 4.5)
Max follow-up-years	6.8	6.9	13.9

^aP < 0.05,

^bP < 0.05,

^cP < 0.05,

^dP < 0.05,

^eP < 0.05, ^fP < 0.05 vs the other two group.