Table 5.

Multiple regression models for standardised admission rates

Factors included in model	Coefficient*	P value	% of variation explained
Overall admissions model†:
Chronically ill (%)	2.72	0.012	53.5
Unskilled (%)	5.66	<0.001
Moved in past year (%)	−2.19	<0.001
Cervical smear uptake (%)	0.36	0.008
Emergency admissions model†:
Chronically ill (%)	2.35	0.039	57.2
Unskilled (%)	6.41	<0.001
Moved in past year (%)	−2.83	<0.001
Child health surveillance offered (Y/N)	9.50	0.009
Elective admissions model†:
Chronically ill (%)	4.93	<0.001
Moved in past year (%)	−2.78	0.003	36.8
Minor surgery offered (Y/N)	9.34	0.022

^*Meaning of coefficients: for example, an increase of 1% in percentage chronically ill implies an increase of 2.72 in the age-sex standardised ratio for overall admissions. 

^†All models include practices’ proportion of admissions to each of six local general hospitals.