Table 4

Results of mixed models (including case mix adjustment)

Endpoint (interpretation)	Model	Estimate (95% CI)	P
Admission proportion (odds ratio)	Unadjusted	0.82 (0.70 to 0.97)	0.017
	Adjusted	0.82 (0.69 to 0.98)	0.026
	Combined model	0.82 (0.69 to 0.96)	0.016
Mortality (odds ratio)*	Unadjusted	0.54 (0.39 to 0.75)	<0.001
Mortality (odds ratio)*	Combined model	0.53 (0.39 to 0.72)	<0.001
Emergency admissions (incidence rate ratio)	Unadjusted	0.81 (0.65 to 1.00)	0.046
	Adjusted	0.85 (0.72 to 1.00)	0.056
	Combined model	0.81 (0.69 to 0.95)	0.011
Elective admissions (incidence rate ratio)	Unadjusted	0.89 (0.75 to 1.07)	0.219
	Adjusted	0.87 (0.74 to 1.02)	0.078
	Combined model	0.90 (0.76 to 1.07)	0.241
Outpatient attendances (incidence rate ratio)	Unadjusted	0.96 (0.81 to 1.13)	0.621
	Adjusted	1.01 (0.92 to 1.12)	0.814
	Combined model	0.95 (0.81 to 1.13)	0.575
Emergency department visits (incidence rate ratio)	Unadjusted	0.85 (0.70 to 1.05)	0.135
	Adjusted	0.85 (0.73 to 1.00)	0.044
	Combined model	0.86 (0.72 to 1.02)	0.091
Bed days (difference in geometric means)	Unadjusted	−0.64 (−1.14 to −0.10)	0.023
	Adjusted	−0.44 (−0.85 to −0.01)	0.047
	Combined model	−0.58 (−1.00 to −0.13)	0.013
Tariff costs (difference in geometric means (£))	Unadjusted	−449 (−964 to 243)	0.181
	Adjusted	−242 (−629 to 228)	0.290
	Combined model	−382 (−840 to 206)	0.184

*One of the models did not converge for mortality.