Table 1.

Participant Characteristics for the Healthy Subpopulation and the Whole UK Biobank Population

	Healthy Subpopulation			Whole Population
	Persons	Men	Women	Persons	Men	Women
Participants (n)	141 254	65 869	75 385	480 019	219 248	260 771
Person-years at risk (millions)	1.2	0.56	0.64	4.12	1.87	2.25
Median age at baseline (years)	56.0	55.7	56.4	58.3	58.8	58.0
Age band at baseline in years (%)
40–44	12.1	13.9	10.5	10.2	10.4	10.1
45–49	15.9	16.5	15.4	13.1	12.7	13.4
50–54	17.8	17.1	18.4	15.1	14.4	15.8
55–59	19.4	18.6	20.1	18.1	17.5	18.6
60–64	21.9	21.0	22.6	24.3	24.3	24.3
65–70	12.9	12.9	13.0	19.2	20.8	17.9
IMD 2010 quintile (%)
Q1 (least deprived)	23.9	23.8	24.1	20.0	19.7	20.1
Q2	22.2	22.1	22.3	20.0	19.7	20.3
Q3	20.9	20.7	21.1	20.0	19.8	20.2
Q4	18.7	18.7	18.7	20.0	19.9	20.1
Q5 (most deprived)	14.3	14.7	13.9	20.0	20.9	19.3
Smoker status (%)
Current	0.0	0.0	0.0	10.5	12.4	8.8
Previous	33.4	35.9	31.2	34.5	38.3	31.3
Never	66.6	64.1	68.8	54.5	48.8	59.4
No answer/missing	0.0	0.0	0.0	0.5	0.5	0.5
Alcohol consumption frequency (%)
Never	5.5	4.5	6.5	8.0	6.3	9.5
Special occasions only	8.8	5.6	11.6	11.5	7.3	15.0
One to three times a month	10.5	8.6	12.3	11.1	8.9	13.0
Once or twice a week	27.3	27.2	27.4	25.8	25.9	25.7
Three or four times a week	26.8	29.5	24.5	23.1	26.1	20.5
Daily or almost daily	21.0	24.7	17.7	20.3	25.3	16.1
No answer/missing	0.0	0.0	0.0	0.2	0.2	0.2
Health events during follow-up (n)
Deaths from chronic disease	2394	1357	1037	18 799	11 362	7437
Prior age-related hospital admissions	6206	2953	3253	74 811	35 401	39 410
Incident age-related hospital admissions	21 627	10 317	11 310	93 716	43 700	50 016

Note: IMD = Index of Multiple Deprivation.