Table 1.

NHSI age-standardized baseline characteristics^1,2, n = 38,101.

	Vitamin D total (IU), 6 categories
	0– < 200 (n = 6472)	200– < 400 (n = 6208)	400– < 600 (n = 9421)	600– < 800 (n = 8146)	800– < 1000 (n = 3942)	> =1000 (n = 3912)
Demographics
Age,* mean (SD)	67 (7)	67 (7)	67 (7)	68 (7)	67 (7)	68 (7)
Race/Ethnicity
White, %	97	97	97	97	97	97
Black, %	2	2	2	2	2	2
Asian, %	1	1	1	1	1	1
Other, %	0	0	0	0	0	0
Health and Lifestyle
BMI (kg/m2), mean ± SD	27 (5)	26 (5)	26 (5)	26 (5)	26 (4)	25 (4)
Physical activity (METS)3, mean ± SD	15 (21)	18 (21)	19 (23)	20 (22)	21 (25)	21 (26)
Cigarette Smoking
never, %	43	45	45	47	46	47
past, %	44	45	47	46	48	48
current, %	13	9	8	7	6	5
Medical Comorbidities
Thiazide Diuretic usage, %	13	13	14	15	14	14
Type 2 Diabetes, %	7	7	5	6	6	5
Vascular disease, %	3	2	2	2	1	2
Depression, %	5	5	6	5	6	6
Obstetrical and Gynecological
Parity
0, %	5	6	6	6	6	7
1–2, %	36	36	36	37	36	38
3+, %	58	58	58	58	58	55
Hysterectomy, %	38	39	38	39	39	38
Post-menopausal hormone use
never, %	34	30	26	26	24	23
past, %	37	38	39	39	42	42
current, %	29	32	35	35	34	34

¹Values are means (SD) for continuous variables; percentages for categorical variables, and are standardized to the age distribution of the study population.

²Values of polytomous variables may not sum to 100 % due to rounding.

³Metabolic Equivalents (METS).

^*Value is not age adjusted.