Table 1:
Clinical and Demographic Characteristics
| Variable | Mean (SD) or n (%) |
|---|---|
| Age at V2 (years), mean (SD) | 48.6 (2.7) |
| BMI at V2, kg/m2, mean (SD) | 28.0 (7.2) |
| Race/ethnicity, n (%) | |
| Black | 386 (24.4) |
| White | 778 (49.1) |
| Chinese | 172 (10.9) |
| Hispanic | 66 (4.2) |
| Japanese | 183 (11.6) |
| Country of origin, n (%) | |
| United States | 1225 (77.3) |
| Other | 311 (19.6) |
| Unknown | 49 (3.1) |
| Household income at V2, n (%) | |
| <$20,000 | 142 (9.0) |
| $20,000 to <$35,000 | 183 (11.5) |
| $35,000 to <$50,000 | 236 (14.9) |
| $50,000 to <$75,000 | 389 (24.5) |
| ≥$75,000 | 559 (35.3) |
| Unknown | 76 (4.8) |
| Language use at V2, n (%) | |
| Non-English language only | 78 (4.9) |
| English and non-English language | 181 (11.4) |
| English language only | 1299 (81.9) |
| Unknown | 27 (1.8) |
| Educational attainment, n (%) | |
| Less than high school | 69 (4.4) |
| Completed high school or GED | 252 (15.9) |
| Some college | 468 (29.5) |
| College graduate | 359 (22.6) |
| Post-graduate education | 425 (26.8) |
| Unknown | 12 (0.8) |
| Covered by health insurance at V2, n (%) | |
| Yes | 1489 (93.9) |
| No | 96 (6.1) |
| Taking MVI or vitamin D at V2, n (%) | 643 (40.8) |
| Vitamin use over observation period, n (%) | |
| Neither V2 nor V12 | 395 (24.9) |
| Discontinued after V2 | 124 (7.8) |
| Initiated after V2 | 539 (34.0) |
| Both V2 and V12 | 519 (32.8) |
| Unknown | 8 (0.5) |
| 25(OH)D at V2 (nmol/L), mean (SD) | 53.8 (24.3) |
| 25(OH)D <50 nmol/L at V2, n (%) | 683 (43.1) |
| 25(OH)D ≤30 nmol/L at V2, n (%) | 324 (20.4) |
V2, Visit 2, GED, general education diploma; MVI, multivitamin; 25(OH)D, 25-hydroxyvitamin D.