Table 4.
Linear mixed model results for modeling each independent variable on bone turnover markers. Model coefficients and standard errors are presented. For the race and season interactions, if the interaction was not significant, the race or season adjusted coefficient of the independent variable is presented with its corresponding standard error. If the interaction was significant, coefficients for the independent variable are presented stratified by corresponding interacting variable.
| Outcome | Predictor | Adjusted
Model beta(SE) |
Full Model beta (SE) |
|---|---|---|---|
|
| |||
| CTx | 25(OH)D | −.00077 (.0021) | −.00078 (.0021) |
| Diet vitamin D | -- | ||
| Diet calcium | .00007 (.000037) | ||
| Sun exposure (>2 hrs) | -- | ||
| Skin type (IV, V) | .066 (.083) | ||
| BMI (inverse) | -- | ||
|
| |||
| PTH (log) | Summer: .087(.052) | Summer: .077 (.053) | |
| Winter: .27(.06)*** | Winter: .27 (.061)*** | ||
| Diet vitamin D | -- | ||
| Diet calcium | . | .000046 (.00004) | |
| Sun exposure (>2 hrs) | -- | ||
| Skin type (IV, V) | .098 (.096) | ||
| BMI (inverse) | −4.3 (3.5) | ||
|
| |||
| OC | 25(OH)D | −.036(.054) | −.037 (.054) |
| Diet vitamin D | -- | ||
| Diet calcium | -- | ||
| Sun exposure (>2 hrs) | -- | ||
| Skin type (IV, V) | −.56 (2.6) | ||
| BMI (inverse) | -- | ||
|
| |||
| PTH (log) | 2.6(1.1)* | 2.5 (1.1)* | |
| Diet vitamin D | -- | ||
| Diet calcium | .00098 (.0011) | ||
| Sun exposure (>2 hrs) | -- | ||
| Skin type (IV, V) | −.072 (2.7) | ||
| BMI (inverse) | 47 (97) | ||
*
p<0.05,
**
p<0.01,
***
p<0.001