Public sector		Private sector
	n=368		n=325
Age (years)	Mean (SD)*	Med (IQR)**	Mean (SD)	Med (IQR)
	61 (11.1)	62 (54-69)	66 (12.1)	67 (59-75)
Age group	n	%	n	%
<50	53	14.4%	30	9.3%
50–65	173	47.0%	117	36.1%
66+	142	38.6%	177	54.6%
Gender	n=368		n=325
Male	193	52.4%	160	49.2%
Female	175	47.6%	165	50.8%
Body Mass Index	n=314		n=322
<30	252	80.3%	241	74.8%
30+	62	19.7%	81	25.2%
Smoker	n=368		n=324
Non or stopped 4 weeks before surgery	296	80.4%	289	89.2%
Yes	72	19.6%	35	10.8%
Alcohol Use	n=368		n=324
Non or stopped 4 weeks before surgery	306	83.2%	153	47.2%
Yes	62	16.8%	171	52.8%
ASA Class	n=364		n=325
ASA 1–2	206	56.6%	270	83.1%
ASA 3–4	158	43.4%	55	19.9%
Diabetes	n=368		n=325
No	297	80.7%	275	84.6%
Yes	71	19.3%	50	15.4%
Radiotherapy to site	n=368		n=325
No	164	44.6%	278	85.5%
Yes	204	55.4%	47	14.5%
Pre-op chemotherapy	n=368		n=324
No	182	49.5%	262	80.9%
Yes	186	50.5%	62	19.1%