Table 1. Regression co-efficients for a model of child attendance at Emergency Departments.

Variable	IRR	p-value	Lower 95% CI	Upper 95% CI
Deprivation quintile 1	1.000	∼	∼	∼
Deprivation quintile 2	1.344	<0.001	1.199	1.507
Deprivation quintile 3	1.414	<0.001	1.260	1.588
Deprivation quintile 4	1.882	<0.001	1.676	2.115
Deprivation quintile 5	2.198	<0.001	1.904	2.537
Distance to nearest ED (km)	0.978	<0.001	0.974	0.983
Deprivation quintile 2 * distance to ED	0.986	<0.001	0.980	0.992
Deprivation quintile 3 * distance to ED	0.984	<0.001	0.978	0.990
Deprivation quintile 4 * distance to ED	0.972	<0.001	0.965	0.979
Deprivation quintile 5 * distance to ED	0.962	<0.001	0.952	0.972
Distance to nearest MIU (km)	1.049	<0.001	1.044	1.054
Deprivation quintile 2 * distance to MIU	0.996	0.028	0.992	1.000
Deprivation quintile 3 * distance to MIU	0.997	0.103	0.993	1.001
Deprivation quintile 4 * distance to MIU	0.992	<0.001	0.988	0.996
Deprivation quintile 5 * distance to MIU	0.994	0.025	0.989	0.999
Distance to nearest MIU (km)?2	0.999	<0.001	0.999	0.999
Proportion population aged 5–9	1.288	<0.001	1.150	1.443
Proportion population aged 5–9?2	0.996	<0.001	0.994	0.998
Proportion population aged 10–14	0.923	<0.001	0.892	0.955
Proportion population aged 10–14?2	1.001	<0.001	1.000	1.001