TABLE 3.
Mean circulating serum 25(OH)D and 1,25(OH)2D concentrations and category of adherence score by study1
| Adherence score |
||||||||||
| 25(OH)D, ng/mL |
1,25(OH)2D, pg/mL |
|||||||||
| n | 0–2 | 3–5 | 6–8 | P-trend | n | 0–2 | 3–5 | 6–8 | P-trend | |
| Pooled sample | 1357 | 26.4 ± 0.7 | 29.6 ± 0.5 | 32.0 ± 0.8 | <0.001 | 854 | 31.9 ± 1.0 | 34.5 ± 0.7 | 36.3 ± 1.3 | 0.008 |
| UDCA | 854 | 25.8 ± 0.8 | 29.4 ± 0.6 | 32.2 ± 1.1 | <0.001 | 854 | 31.7 ± 1.0 | 34.3 ± 0.7 | 36.2 ± 1.3 | 0.001 |
| WBF2 | 503 | 29.1 ± 1.6 | 30.1 ± 0.8 | 32.6 ± 1.0 | 0.012 | — | — | — | — | — |
1
Values are means ± SEs computed from linear regression for individuals in reference categories (white, male, not a college graduate, and nonsmoker in the UDCA trial) centered on mean age and energy intake. Adjusted for sex, study, mean age, race, education, smoking status, and mean energy intake. UDCA, ursodeoxycholic acid; WBF, wheat bran fiber; 1,25(OH)2D, 1α,25-dihydroxyvitamin D; 25(OH)D, 25-hydroxycholecalciferol.
2
WBF supplement trial (low fiber compared with high fiber) did not measure 1,25(OH)2D.