Table 3.
Evolution of serum 25OHD in subjects distributed according to their initial vitamin D status.
| Gr.Suppl.0 |
Gr.Suppl.5 |
Gr.Suppl.10 |
||||
|---|---|---|---|---|---|---|
| Low Stratum | High Stratum | Low Stratum | High Stratum | Low Stratum | High Stratum | |
|
n |
18 |
27 |
19 |
25 |
16 |
28 |
| BSL | 22.0 (7.4) | 46.0 (12.1) | 26.8 (10.4) | 43.9 (13.0) | 23.0 (8.5) | 43.2 (12.5) |
| WK4 | 19.2 (8.8) | 40.1 (12.0) | 35.3 (9.4) | 46.1 (11.3) | 38.2 (10.0) | 48.1 (10.5) |
| WK8 | 24.9 (10.5) | 44.4 (14.9) | 44.2 (11.1) | 52.3 (12.9) | 50.1 (16.7) | 56.7 (16.3) |
| WK12 | 27.7 (13.0) | 46.1 (16.8) | 45.3 (12.3) | 55.3 (17.8) | 51.6 (15.2) | 57.5 (16.1) |
| WK16 | 33.8 (16.2) | 51.0 (15.8) | 50.2 (13.3) | 58.4 (17.1) | 54.0 (17.5) | 62.5 (16.5) |
| WK24 | 37.9 (14.1) | 57.2 (17.7) | 46.0 (13.5) | 57.7 (17.9) | 50.8 (14.9) | 63.5 (21.1) |
25OHD = 25-hydroyvitamin D, Gr.Suppl.0 = no vitamin D3–fortified yogurt consumption; recommendation to maintain dietary habits during 24 weeks, Gr.Suppl.5 = 1 vitamin D3–fortified yogurt/d during 16 weeks followed by 8 weeks without product, Gr.Suppl.10 = 2 vitamin D3–fortified yogurts/d during 16 weeks followed by 8 weeks without product, BSL = baseline visit, WK4 toWK24 = number of weeks elapsed from the baseline visit, WK16 = end of the intervention for both Gr.Suppl.5 and Gr.Suppl.10, WK24 = 8 weeks after discontinuation of the intervention for both Gr.Suppl.5 and Gr.Suppl.10.
Serum 25OHD values are means (SD) in nanomoles per liter. The participants were distributed as low or high according to their serum 25OHD screening values; that is, before the BSL visit. Low stratum range: 25 to 50 nmol/L; high stratum range: ≥50 to 75 nmol/L. Probability levels for group-by-time interaction (repeated measures analysis of variance) for the evolution of serum 25OHD from BSL to WK16 were as follows: low stratum: p = 0.0001 and p = 0.0012 for the difference between Gr.Suppl.10 or Gr.Suppl.5 and Gr.Suppl.0, respectively, and p = 0.0346 for the difference between Gr.Suppl.10 and Gr.Suppl.5.