Table 1. Multiple regression model of relationship between hospital admission due to diabetes, IMD quintile and ethnicity.

Variables	Relative Risk	95% Confidence Interval	P-value
IMD quintile
Quintile 1 (Least Deprived)	1	N.A.
Quintile 2	1.16	1.13–1.19	<0.001
Quintile 3	1.35	1.32–1.39	<0.001
Quintile 4	1.68	1.63–1.73	<0.001
Quintile 5 (Most Deprived)	2.08	2.02–2.14	<0.001
Age
16–29 years	1	N.A.
30–44 years	2.28	2.22–2.34	<0.001
45–64 years	5.88	5.74–6.02	<0.001
65 + years	14.17	13.83–14.51	<0.001
Sex
Men	1	N.A.
Women	0.64	0.63–0.64	<0.001
Region type
Urban	1	N.A.
Town	0.89	0.87–0.91	<0.001
Village	0.81	0.80–0.83	<0.001
Ethnicity
White	1	N.A.
Mixed	1.49	1.29–1.72	<0.001
South Asian	2.62	2.51–2.74	<0.001
Black	1.22	1.09–1.37	0.001
Asian	1.02	0.87–1.21	0.783
Others	1.32	1.21–1.43	<0.001
IMD/ethnicity interaction
IMD Quintile 1: all	1	N.A.
IMD Quintile 2:
Mixed	0.83	0.68–1.01	0.061
South Asian	0.91	0.86–0.97	0.004
Black	1.23	1.07–1.42	0.004
Asian	1.22	0.95–1.57	0.111
Others	1.03	0.92–1.16	0.585
IMD Quintile 3:
Mixed	1.15	0.97–1.37	0.10
South Asian	0.85	0.81–0.91	<0.001
Black	1.20	1.05–1.36	0.006
Asian	0.83	0.65–1.06	0.135
Others	1	0.90–1.11	0.946
IMD Quintile 4:
Mixed	0.73	0.61–0.86	<0.001
South Asian	0.81	0.77–0.86	<0.001
Black	1.12	0.99–1.26	0.068
Asian	1.10	0.89–1.36	0.371
Others	0.89	0.80–0.98	0.019
IMD Quintile 5:
Mixed	0.86	0.73–1.01	0.074
South Asian	0.81	0.77–0.85	<0.001
Black	1.10	0.97–1.24	0.127
Asian	1.07	0.87–1.32	0.538
Others	0.86	0.78–0.95	0.003
Admission method
Elective	1	N.A.
Emergency	1.61	1.60–1.62	<0.001
Likelihood ratio statistic against without random effect mode (p-value)	129728.94(<0.001)