Table 1.

Summary of Demographic Characteristic and Disease Variables, N=404,318

Variable	n	%
Sex
Men	198,301	49
Women	206,017	51
Age Group (Years)
0–9	41,601	10.3
10–19	45,664	11.3
20–29	50,065	12.4
30–39	65,695	16.2
40–49	64,837	16
50–59	53,272	13.2
60–69	39,427	9.8
70–79	25,348	6.3
80+	18,409	4.5
Townsend Deprivation Score
Quintile 1 (least deprived)	48,934	12.1
Quintile 2	64,788	16
Quintile 3	101,305	25.1
Quintile 4	102,626	25.4
Quintile 5 (most deprived)	86,665	21.4
Ethnic Group
White	224,403	55.5
Asian	35,027	8.7
Black	30,771	7.6
Mixed/Other	19,483	4.8
Missing	94,634	23.4
Disease Indicator
Type 2 diabetes	22,100	5.5
Heart attack	5,101	1.3
Stroke	7,670	1.9
Chronic kidney disease	18,584	4.6
Sickle cell disease	311	0.1
Thalassaemia	2,282	0.6
Schizophrenia	2,059	0.5
Total	404,318	100

Note: Adapted from Pham TM, Carpenter JR, Morris TP, Wood AM, Petersen I. Population-calibrated multiple imputation for a binary/categorical covariate in categorical regression models. Stat Med. 2019;38(5):792-808. doi:10.1002/sim.8004. Creative Commons license and disclaimer available from: http://creativecommons.org/licenses/by/4.0/legalcode.²⁵