Table 2.

Odds Ratios (ORs) for the adjusted multilevel multivariate logistic regression inpatient mortality analyses.

	CCI	eFI	HFRS
ICU admission	2.624 (2.505, 2.749)	2.669 (2.55, 2.794)	2.301 (2.197, 2.411)
Age category (years, baseline 18–49)
50–59	1.982 (1.782, 2.205)	2.278 (2.049, 2.532)	2.070 (1.861, 2.302)
60–69	2.999 (2.731, 3.294)	3.670 (3.341, 4.03)	3.208 (2.921, 3.523)
70–79	4.398 (4.021, 4.811)	5.598 (5.113, 6.13)	4.427 (4.048, 4.842)
80 +	8.665 (7.938, 9.458)	10.997 (10.051, 12.033)	7.422 (6.794, 8.108)
Sex (baseline—Female)
Male	1.034 (1.004, 1.066)	1.105 (1.073, 1.138)	1.119 (1.087, 1.153)
Charlson index (baseline—less than 1)
(1–10)	1.154 (1.107, 1.204)	–	–
> 10	2.501 (2.409, 2.596)	–	–
electronic Frailty Index (baseline–fit)
Mild	–	1.085 (1.040, 1.133)	–
Moderate	–	1.128 (1.078, 1.181)	–
Severe	–	1.165 (1.103, 1.231)	–
HFRS (baseline – Low risk)
Intermediate	–	–	2.648 (2.548, 2.752)
High	–	–	3.306 (3.165, 3.452)
WIMD (Baseline—1. Most Deprived)
2	0.983 (0.941, 1.028)	0.975 (0.933, 1.018)	0.979 (0.937, 1.024)
3	0.927 (0.885, 0.971)	0.912 (0.872, 0.955)	0.940 (0.898, 0.985)
4	0.977 (0.933, 1.024)	0.962 (0.919, 1.007)	0.981 (0.936, 1.028)
5. Least Deprived	0.959 (0.916, 1.005)	0.953 (0.911, 0.998)	0.955 (0.912, 1.001)
Intercept	0.037 (0.032, 0.043)	0.042 (0.037, 0.049)	0.029 (0.025, 0.035)
Random effects
Variance	0.029 (0.002, 0.056)	0.028 (0.002, 0.055)	0.048 (0.003, 0.093)
–	–	–	–
Observations	107,188	107,188	107,188
Groups (Admission Year)	9	9	9
AUC	0.711 (0.708, 0.715)	0.677 (0.674, 0.681)	0.711 (0.708, 0.714)

ICU Intensive Care Unit; CCI Charlson Comorbidity Index; eFI electronic Frailty Index; HFRS Hospital Frailty Risk Score; WIMD Welsh Index of Multiple Deprivation 2019; AUC Area Under the Curve.