Table 2.
| Vitamin D total (IU), 6 categories |
||||||
|---|---|---|---|---|---|---|
| 0– < 200 (n = 7555) | 200– < 400 (n = 7657) | 400– < 600 (n = 7839) | 600– < 800 (n = 6214) | 800– < 1000 (n = 2973) | > = 1000 (n = 2956) | |
| Demographics | ||||||
| Age,* mean (SD) | 49 (5) | 50 (5) | 50 (5) | 51 (5) | 51 (4.5) | 52 (4) |
| Race/Ethnicity | ||||||
| White, % | 97 | 97 | 97 | 97 | 97 | 96 |
| Black, % | 1 | 1 | 1 | 1 | 1 | 2 |
| Asian, % | 1 | 2 | 1 | 2 | 1 | 2 |
| Other, % | 1 | 1 | 1 | 0 | 0 | 1 |
| Health and Lifestyle | ||||||
| BMI (kg/m2), mean (SD) | 27 (6) | 26 (6) | 26 (6) | 26 (5) | 26 (6) | 26 (6) |
| Physical activity (METS)3, mean ± SD | 21 (30) | 25 (30) | 25 (29) | 27 (30) | 28 (34) | 31 (39) |
| Cigarette Smoking | ||||||
| never, % | 64 | 66 | 68 | 68 | 68 | 68 |
| past, % | 25 | 27 | 26 | 27 | 27 | 27 |
| current, % | 10 | 7 | 6 | 6 | 4 | 5 |
| Medical Comorbidities | ||||||
| Thiazide Diuretic usage, % | 8 | 7 | 8 | 8 | 8 | 7 |
| Type 2 Diabetes, % | 3 | 2 | 3 | 3 | 3 | 3 |
| Vascular disease, % | 0 | 0 | 0 | 0 | 0 | 0 |
| Depression, % | 11 | 10 | 11 | 11 | 11 | 13 |
| Obstetrical and Gynecological | ||||||
| Parity | ||||||
| 0, % | 18 | 18 | 20 | 22 | 23 | 25 |
| 1–2, % | 52 | 52 | 53 | 52 | 53 | 51 |
| 3+, % | 30 | 30 | 27 | 26 | 24 | 24 |
| Hysterectomy, % | 20 | 20 | 21 | 21 | 21 | 24 |
| Post-menopausal hormone use | ||||||
| pre/never, % | 74 | 74 | 72 | 71 | 70 | 68 |
| past, % | 14 | 13 | 15 | 16 | 15 | 16 |
| current, % | 12 | 12 | 13 | 14 | 15 | 16 |
1
Values are means (SD) for continuous variables; percentages for categorical variables, and are standardized to the age distribution of the study population.
2
Values of polytomous variables may not sum to 100 % due to rounding.
3
Metabolic Equivalents (METS).
*
Value is not age adjusted.