TABLE 3.
Prevalence of detectable serum C3-epi-25(OH)D3 and serum 25(OH)D2 concentrations stratified by vitamin D–containing dietary supplement use and grouped by age, sex, or race-ethnicity for persons aged ≥1 y: NHANES 2007–20101
| C3-epi-25(OH)D3, % |
25(OH)D2, % |
|||||
| Vitamin D supplements |
Vitamin D supplements |
|||||
| Group | Overall | Nonusers | Users | Overall | Nonusers | Users |
| All | 85.6* (82.8, 88.1) | 82.7 (79.3, 85.7) | 91.1 (89.1, 92.7) | 18.9* (16.8, 21.1) | 10.5 (8.7, 12.6) | 34.4 (31.5, 37.4) |
| Age, y | ||||||
| 1–5 | 98.1* (96.6, 98.9) | 97.4 (95.5, 98.6) | 99.4 (97.8, 99.8) | 11.0* (8.7, 13.7) | 8.3 (6.3, 10.9) | 16.4 (11.8, 22.4) |
| 6–11 | 96.3* (94.5, 97.5) | 95.2 (93.0, 96.8) | 98.6 (96.9, 99.4) | 9.9* (7.3, 13.4) | 6.9 (4.1, 11.3) | 16.2 (12.5, 20.7) |
| 12–19 | 87.8* (84.3, 90.6) | 86.4 (82.5, 89.6) | 93.7 (90.0, 96.1) | 8.2* (5.5, 11.9) | 6.2 (4.0, 9.4) | 16.8 (11.1, 24.6) |
| 20–39 | 82.7* (78.8, 86.0) | 80.6 (76.2, 84.4) | 88.4 (84.1, 91.6) | 13.6* (11.9, 15.6) | 8.4 (6.7, 10.4) | 27.8 (23.9, 32.0) |
| 40–59 | 84.7* (81.5, 87.4) | 81.1 (77.2, 84.5) | 90.4 (87.5, 92.6) | 21.1* (17.9, 24.6) | 12.1 (9.6, 15.3) | 35.3 (31.0, 39.9) |
| ≥60 | 83.0* (80.1, 85.8) | 75.4 (70.4, 79.7) | 90.3 (88.1, 92.1) | 34.5* (31.4, 37.8) | 18.6 (16.2, 21.3) | 49.0 (44.7, 53.2) |
| Sex | ||||||
| Male | 88.6* (85.6, 91.0) | 87.0 (83.4, 89.9) | 92.2 (90.0, 94.0) | 18.2* (15.7, 20.9) | 10.0 (8.1, 12.3) | 36.9 (32.5, 41.5) |
| Female | 82.7* (79.8, 85.4) | 78.0 (74.3, 81.2) | 90.2 (88.0, 92.0) | 19.5* (17.5, 21.7) | 11.0 (9.1, 13.2) | 32.6 (29.6, 35.6) |
| Race-ethnicity | ||||||
| Hispanic2 | 82.4* (77.8, 86.2) | 81.0 (76.3, 85.0) | 87.8 (82.7, 91.5) | 10.2* (9.2, 11.4) | 6.4 (5.3, 7.6) | 25.1 (21.9, 28.6) |
| Non-Hispanic black | 64.2* (56.0, 71.7) | 61.7 (53.1, 69.6) | 72.4 (63.2, 80.0) | 12.2* (11.1, 13.5) | 7.5 (5.9, 9.6) | 27.4 (23.4, 31.8) |
| Non-Hispanic white | 91.0* (89.5, 92.2) | 89.1 (87.3, 90.7) | 93.7 (92.3, 94.9) | 21.7* (19.1, 24.6) | 12.0 (9.5, 15.0) | 36.1 (32.8, 39.5) |
1
Estimates are weighted percentages (95% CIs). *Supplement users and nonusers differ, P < 0.05 (Wald F-test). C3-epi-25(OH)D3, C3-epimer of 25-hydroxycholecalciferol; 25(OH)D2, 25-hydroxyergocalciferol.
2
The Hispanic subgroup represents the sum of Mexican-American and other Hispanic ethnicities.