TABLE 3.
Sequential linear regression with (log of) 25(OH)D concentration predicting testosterone concentration
| Predictors | Regression Coefficient | Standard Error | Standardized Regression Coefficient | p-value | ΔR2 (adjusted) |
|---|---|---|---|---|---|
| Step 1a | 0.057 | ||||
| Age | 2.026 | 0.775 | 0.401 | 0.012 | |
| FFM | -0.085 | 0.132 | -0.145 | 0.521 | |
| FM | 0.189 | 0.236 | 0.174 | 0.429 | |
| Step 2b | 0.039 | ||||
| 25(OH)D | 2.747 | 1.588 | 0.244 | 0.090 |
Note. Vitamin D status for the athletes was log-transformed. n = 50.
a
Predictors: Age, FFM, and FM.
b
Predictors: Age, FFM, FM and 25(OH)D.