Table 1.

Demographic characteristics of US adults aged ≥19 years, National Health and Nutrition Examination Survey, 2007–2010^*,^†,^‡

Characteristic	n	%	se
Age group (years)
19–30	1820	21·0	0·7
31–50	3239	38·2	0·8
51–70	3025	29·5	0·8
>70	1635	11·3	0·4
Gender
Male	4840	49·0	0·4
Female	4879	51·0	0·4
BMI (kg/m2)
<24·9	2694	30·2	0·8
25·0–29·9	3374	34·4	0·7
≥30·0	3651	35·4	0·6
Ethnic group
Hispanic	2735	13·4	1·9
Non-Hispanic White	5005	74·9	2·3
Non-Hispanic Black	1979	11·8	1·2
Income
Low	3128	21·2	1·1
Middle	1326	10·6	0·4
High	5265	68·3	1·2
Vitamin D supplement
Yes	2584	29·7	0·9
No	7135	70·3	0·9

^*Total sample size of 9719, weighted to represent the US adult population of 193 million.

^†Income categorized by poverty income ratio (PIR), with ≤131% of PIR = low income, >131% to ≤185% of PIR = medium income and >185% of PIR = high income.

^‡Vitamin D supplements include any supplement containing vitamin D.