Table 3.

Adjusted odds ratios (AOR) for death within 30 days of surgery

	Multiple Imputation (MAR)			Multiple Imputation (MNAR)
Characteristic	AOR	(95% CI)	p value	AOR	(95% CI)	p value
Age at diagnosis (per 10 years)	2.12	(2.07–2.17)	<0.001	2.08	(2.03–2.13)	<0.001
Year of diagnosis (per advancing year	0.97	(0.97–0.98)	<0.001	0.98	(0.97–0.98)	<0.001
Sex
Female	1.00			1.00
Male	1.21	(1.16–1.26)	<0.001	1.21	(1.16–1.26)	<0.001
Operation
Elective	1.00			1.00
Emergency	2.67	(2.53–2.82)	<0.001	2.76	(2.61–2.91)	<0.001
Dukes’ stage at diagnosis
A	1.00			1.00
B	1.24	(1.14–1.35)	<0.001	1.15	(1.04–1.26)	0.005
C	1.54	(1.42–1.68)	<0.001	1.29	(1.18–1.42)	<0.001
D	2.48	(2.25–2.73)	<0.001	1.82	(1.66–2.00)	<0.001
IMD income category
1 (Most affluent)	1.00			1.00
2	1.03	(0.96–1.10)	0.429	1.03	(0.96–1.10)	0.417
3	1.11	(1.04–1.19)	<0.001	1.12	(1.04–1.19)	0.002
4	1.21	(1.13–1.30)	<0.001	1.22	(1.14–1.30)	<0.001
5 (Most deprived)	1.32	(1.23–1.42)	<0.001	1.32	(1.23–1.42)	<0.001
Cancer site
Colon	1.00			1.00
Rectosigmoid	0.88	(0.82–0.96)	0.003	0.88	(0.82–0.96)	0.003
Rectum	0.94	(0.89–0.99)	0.018	0.91	(0.86–0.96)	0.001
Charlson comorbidity score
0	1.00			1.00
1	2.05	(1.94–2.17)	<0.001	2.06	(1.95–2.19)	<0.001
2	2.43	(2.25–2.62)	<0.001	2.42	(2.24–2.61)	<0.001
≥3	4.39	(3.99–4.83)	<0.001	4.35	(3.96–4.79)	<0.001