Table 2.

Multivariable logistic regression model for in‐hospital, 30‐day, 90‐day and 1‐year mortality emergency general surgery index index admission

	In‐hospital mortality		30‐day mortality		90‐day mortality		1‐year mortality
	Odds ratio	P	Odds ratio	P	Odds ratio	P	Odds ratio	P
Time
Year of admission	0·95 (0·94, 0·95)	< 0·001	0·97 (0·97, 0·97)	< 0·001	0·97 (0·97, 0·97)	< 0·001	0·98 (0·98, 0·98)	< 0·001
Sex
M	1·00 (reference)		1·00 (reference)		1·00 (reference)		1·00 (reference)
F	1·11 (1·08, 1·14)	< 0·001	0·98 (0·96, 0·99)	< 0·001	0·95 (0·94, 0·97)	< 0·001	0·88 (0·087, 0·89)	< 0·001
Operative status
No operation	1·00 (reference)		1·00 (reference)		1·00 (reference)		1·00 (reference)
Operation	0·66 (0·64, 0·68)	< 0·001	0·80 (0·78, 0·81)	< 0·001	0·91 (0·90, 0·93)	< 0·001	0·97 (0·95, 0·98)	< 0·001
Co‐morbidity
None	1·00 (reference)		1·00 (reference)		1·00 (reference)		1·00 (reference)
CCI score 1–4	3·80 (3·68, 3·92)	< 0·001	3·72 (3·64, 3·80)	< 0·001	4·25 (4·18, 4·32)	< 0·001	4·59 (4·53, 4·64)	< 0·001
CCI score > 4	12·50 (11·90, 13·12)	< 0·001	12·92 (12·47, 13·39)	< 0·001	19·11 (18·57, 19·70)	< 0·001	27·42 (26·60, 28·25)	< 0·001
Age group (years)
16–30	1·00 (reference)		1·00 (reference)		1·00 (reference)		1·00 (reference)
31–45	3·40 (2·73, 4·24)	< 0·001	3·54 (3·14, 4·00)	< 0·001	3·73 (3·40, 4·09)	< 0·001	3·49 (3·30, 3·70)	< 0·001
46–60	13·03 (10·61, 16·00)	< 0·001	10·86 (9·70, 12·16)	< 0·001	11·23 (10·30, 12·24)	< 0·001	9·58 (9·08, 10·11)	< 0·001
61–75	34·64 (28·30, 42·40)	< 0·001	24·94 (22·30, 27·88)	< 0·001	25·12 (23·07, 27·36)	< 0·001	21·21 (20·11, 22·40)	< 0·001
> 75	83·77 (68·48, 102·49)	< 0·001	52·20 (46·68, 58·30)	< 0·001	51·24 (47·06, 55·79)	< 0·001	47·53 (45·10, 50·14)	< 0·001

Values in parentheses are 95 per cent confidence intervals. CCI, Charlson Co‐morbidity Index.