TABLE 2.
Spearman correlations among dairy food (servings/week), calcium (mg/day), and vitamin D (IU/day) intake a and levels of 25(OH)D (ng/mL) and 1,25(OH)2D (pg/mL) among all 296 participants in the Prostate Cancer Risk Assessment Program, and stratified on vitamin D status
| Dairy food | Calcium | Vitamin D | 25(OH)D | 1,25(OH)2D | |
|---|---|---|---|---|---|
| All men (N=296) | |||||
| Dairy food | 1.0 |
0.53 b (p<0.0001) |
0.15
(p=0.008) |
0.21
(p=0.0003) |
0.01 (p=0.87) |
| Calcium | 1.0 |
0.36
(p<0.0001) |
0.29
(p<0.0001) |
0.05 (p=0.39) | |
| Vitamin D | 1.0 |
0.24
(p<0.0001) |
0.10 (p=0.10) | ||
| 25(OH)D | 1.0 |
0.17
(p=0.003) |
|||
| 1,25(OH)2D | 1.0 | ||||
| 25(OH)D >15 ng/mL (N=157) | |||||
| Dairy food | 1.0 |
0.56
(p<0.0001) |
0.14 (p=0.09) |
0.003 (p=0.97) |
-0.002 (p=0.98) |
| Calcium | 1.0 |
0.31
(p<0.0001) |
0.11 (p=0.19) |
0.05 (p=0.52) |
|
| Vitamin D | 1.0 | 0.07 (p=0.39) |
0.12 (p=0.13) |
||
| 25(OH)D | 1.0 | 0.11 (p=0.17) |
|||
| 1,25(OH)2D | 1.0 | ||||
| 25(OH)D ≤15 ng/mL (N=139) | |||||
| Dairy food | 1.0 |
0.44
(p<0.0001) |
0.11 (p=0.21) |
0.09 (p=0.27) |
-0.02 (p=0.86) |
| Calcium | 1.0 |
0.37
(p<0.0001) |
0.24
(p=0.004) |
-0.001 (p=0.99) |
|
| Vitamin D | 1.0 |
0.32
(p=0.0002) |
0.01 (p=0.89) |
||
| 25(OH)D | 1.0 |
0.25
(p=0.004) |
|||
| 1,25(OH)2D | 1.0 |
a
Calcium and vitamin D intake were adjusted for energy intake using the residual method.
b
Boldface indicates p<0.05.