Table 1

Result of logistic regression analyses evaluating the influence of patient and NHS trust level features on the likelihood of receiving surgery clustered by NHS trust (n=34 513)

	No of patients	No who received surgery	(%)^*	Unadjusted OR (95% CI)	Adjusted OR^† (95% CI)	p Value
Sex
Male	20 945	2637	13
Female	13 568	1848	14	1.09 (1.02 to 1.17)	1.06 (0.99 to 1.15)	0.086
Age quintile
1 (30–62 years)	8221	1290	16			<0.001^‡
2 (63–69 years)	7635	1232	16	1.03 (0.95 to 1.13)	0.95 (0.85 to 1.05)
3 (70–75 years)	7693	1050	14	0.85 (0.78 to 0.93)	0.79 (0.71 to 0.89)
4 (76–80 years)	6115	652	11	0.64 (0.58 to 0.71)	0.56 (0.49 to 0.65)
5 (81–100 years)	4849	261	5	0.31 (0.27 to 0.35)	0.26 (0.22 to 0.32)
Stage
IA	1178	722	61			0.001^‡
IB	2138	1029	48	0.59 (0.51 to 0.68)	0.63 (0.52 to 0.76)
IIA	202	121	60	0.94 (0.70 to 1.28)	0.96 (0.72 to 1.28)
IIB	1448	515	35	0.35 (0.30 to 0.41)	0.35 (0.28 to 0.43)
IIIA	2777	380	14	0.10 (0.09 to 0.12)	0.09 (0.07 to 0.11)
IIIB	5427	297	5	0.04 (0.03 to 0.04)	0.03 (0.03 to 0.04)
IV	10 968	271	2	0.02 (0.01 to 0.02)	0.02 (0.01 to 0.02)
Occult	50	15	30	0.27 (0.15 to 0.50)	0.26 (0.13 to 0.52)
Missing	10 325	1135	11	0.08 (0.07 to 0.09)	0.09 (0.07 to 0.12)
Performance status
0	5847	1651	28			<0.001^‡
1	9282	1372	15	0.44 (0.41 to 0.48)	0.52 (0.46 to 0.59)
2	5317	264	5	0.13 (0.12 to 0.15)	0.19 (0.15 to 0.24)
3	3251	67	2	0.05 (0.04 to 0.08)	0.10 (0.08 to 0.14)
4	760	13	2	0.04 (0.03 to 0.88)	0.11 (0.06 to 0.18)
Missing	10 056	1118	11	0.32 (0.29 to 0.35)	0.40 (0.32 to 0.49)
Ethnic group
White	26 511	3443	13			0.39^§
Black	234	27	12	0.87 (0.58 to 1.31)	0.84 (0.47 to 1.49)
Asian	1905	262	14	1.07 (0.93 to 1.22)	1.13 (0.96 to 1.33)
Mixed race	103	10	10	0.72 (0.37 to 1.38)	0.77 (0.33 to 1.78)
Other	161	29	18	1.47 (0.98 to 2.20)	1.41 (0.88 to 2.27)
Missing	5599	714	13	0.98 (0.90 to 1.07)	1.04 (0.92 to 1.17)
Townsend quintile
1 (most affluent)	5184	701	14			0.132^‡
2	6393	856	13	0.99 (0.89 to 1.10)	0.99 (0.88 to 1.11)
3	6660	872	13	0.96 (0.87 to 1.07)	1.04 (0.92 to 1.19)
4	7148	942	13	0.97 (0.87 to 1.08)	0.98 (0.84 to 1.13)
5 (least affluent)	9051	1110	12	0.89 (0.81 to 0.99)	0.86 (0.71 to 1.04)
Missing	77	4	5	0.35 (0.13 to 0.96)	0.43 (0.15 to 1.23)
Charlson Index
0	15 573	2341	15			<0.001^‡
1	6951	985	14	0.93 (0.86 to 1.01)	0.95 (0.86 to 1.04)
2 or 3	5828	752	13	0.83 (0.77 to 0.91)	0.89 (0.80 to 0.99)
4+	6161	407	7	0.40 (0.36 to 0.45)	0.67 (0.56 to 0.80)
Surgery centre
No	25 248	2947	12
Yes	9265	1538	17	1.51 (1.41 to 1.61)	1.51 (1.16 to 1.97)	<0.001
Radiotherapy centre
No	21 646	2614	12
Yes	12 867	1871	15	1.24 (1.16 to 1.32)	1.02 (0.83 to 1.27)	0.854
Trial entry
‘Poor’	23 136	2817	12
‘Good’	11 377	1668	15	1.24 (1.16 to 0.32)	1.15 (0.88 to 1.50)	0.34

↵* Percentage of each variable who received surgery.
↵† OR for surgery adjusted for all other variables in the table.
↵‡ p for trend.
↵§ Result of a log likelihood ratio test.