Table 2.

Adjusted 'ratio of ratios' for all outcome measures, comparing practices across groups and between pre-intervention and intervention years

							With adjustment for overdispersion
Group	Quantity	Intervention practices		Non-intervention practices		Crude relative risk	Point estimate	95% credible limits		P-value
		2004–5	2005–6	2004–5	2005–6			Lower	Upper
Population (50 years and older)	n	13556	13619	72492	72675
Admissions	a	1496	1401	8025	8246
Ever admitted	e	1095	1034	5954	5998
Re-admitted	r	255	226	1365	1421
Analysis
Admissions/registered patient	a/n	0.1104	0.1029	0.1107	0.1135	0.909	0.909	0.841	0.984	0.018
Proportion registered patients ever admitted in year	e/n	0.0808	0.0759	0.0821	0.0825	0.935	0.935	0.855	1.022	0.138
Single admitters as proportion of all registered patients	(e-r)/n	0.0620	0.0593	0.0633	0.0630	0.962	0.962	0.869	1.065	0.457
Re-admitters as a proportion of all registered patients	r/n	0.0188	0.0166	0.0188	0.0196	0.850	0.850	0.700	1.030	0.097
Proportion admitted patients with multiple admissions	r/e	0.233	0.219	0.229	0.237	0.908	0.908	0.765	1.078	0.265
Total admissions per re-admitter	(a-e+r)/r	2.573	2.624	2.517	2.582	0.994	0.995	0.940	1.053	0.820
Re-admissions per re-admitter	(a-e)/r	1.573	1.624	1.517	1.582	0.990	0.991	0.903	1.088
3rd & higher order admissions per re-admitter	(a-e-r)/r	0.573	0.624	0.517	0.582	0.968	0.971	0.753	1.251
Re-admissions per admitter	(a-e)/e	0.366	0.355	0.348	0.375	0.900	0.900	0.772	1.050	0.181
Re-admissions as a proportion of all admissions	(a-e)/a	0.268	0.262	0.258	0.273	0.925	0.926	0.826	1.037