Table 4.

Crude prevalence of pre-diabetes and undiagnosed diabetes and crude yield of HbA1c in the UK Biobank in women by age and ethnic group

	White (n by age group)	South Asian (n by age group)	Black (n by age group)	Chinese (n by age group)	Overall (n by age group)
	22 737/66 796/100 352/41 252	n=705/1388/1107/359	n=668/1513/761/268	n=159/357/291/61	n=24 269/70 054/102 511/41 940
	n (%)	n (%)	n (%)	n (%)	n (%)
Pre-diabetes
Age (years)
40–44	118 (0.5)	28 (4.0)	33 (4.9)	2 (1.3)	181 (0.7)
45–54	1001 (1.5)	97 (7.0)	185 (12.2)	9 (2.5)	1292 (1.8)
55–64	3692 (3.7)	186 (16.8)	157 (20.6)	41 (14.1)	4076 (4.0)
65–74	2416 (5.9)	72 (20.1)	77 (28.7)	9 (14.8)	2574 (6.1)
Undiagnosed diabetes
40–44	30 (0.1)	8 (1.1)	6 (0.9)	0 (0)	44 (0.2)
45–54	183 (0.3)	39 (2.8)	36 (2.4)	3 (0.8)	261 (0.4)
55–64	588 (0.6)	52 (4.7)	32 (4.2)	7 (2.4)	679 (0.7)
65–74	303 (0.7)	17 (4.7)	16 (6.0)	1 (1.6)	337 (0.8)
Pre-diabetes or undiagnosed diabetes
40–44	148 (0.7)	36 (5.1)	39 (5.8)	2 (1.3)	225 (0.9)
45–54	1184 (1.8)	136 (9.8)	221 (14.6)	12 (3.4)	1553 (2.2)
55–64	4280 (4.3)	238 (21.5)	189 (24.8)	48 (16.5)	4755 (4.6)
65–74	2719 (6.6)	89 (24.8)	93 (34.7)	10 (16.3)	2911 (6.9)
	Yield	Yield	Yield	Yield	Yield
Pre-diabetes
40–44	1 in 200	1 in 25	1 in 20	1 in 77	1 in 143
45–54	1 in 67	1 in 14	1 in 8	1 in 40	1 in 56
55–64	1 in 27	1 in 6	1 in 5	1 in 7	1 in 25
65–74	1 in 17	1 in 5	1 in 4	1 in 7	1 in 16
Undiagnosed diabetes
40–44	1 in 1000	1 in 91	1 in 111	N/A	1 in 500
45–54	1 in 333	1 in 36	1 in 42	1 in 125	1 in 250
55–64	1 in 167	1 in 21	1 in 24	1 in 42	1 in 143
65–74	1 in 143	1 in 21	1 in 17	1 in 63	1 in 125
Pre-diabetes or undiagnosed diabetes
40–44	1 in 143	1 in 20	1 in 17	1 in 77	1 in 111
45–54	1 in 56	1 in 10	1 in 7	1 in 30	1 in 46
55–64	1 in 23	1 in 5	1 in 4	1 in 6	1 in 22
65–74	1 in 15	1 in 4	1 in 3	1 in 6	1 in 15

Yield refers to the average number needing to be tested to identify one case.

HbA1c, glycated hemoglobin; n, number; N/A, not available.