Table 3.
Adjusted Associationsa Between PA Levels at ARIC Visit 1 and 25(OH)D at ARIC Visit 2, Stratified by Race
| White Race (n = 8201) | Black Race (n = 2141) | |
|---|---|---|
| Relative risk ratio (95% CI)b for deficient 25(OH)D <20 ng/mLd | ||
| AHA-defined PA categories | ||
| Poor (reference) | Reference (1) | Reference (1) |
| Intermediate | 0.85 (0.76, 0.95) | 1.07 (0.93, 1.23) |
| Recommended | 0.63 (0.56, 0.71) | 0.93 (0.80, 1.07) |
| METS*min/wk (per 100) | 0.96 (0.96, 0.97) | 1.00 (0.99, 1.00) |
| Difference [β coefficient (95% CI)]c in continuous 25(OH)D levelsd | ||
| PA levels | ||
| Poor (reference) | Reference (0) | Reference (0) |
| Intermediate | 0.79 (0.32, 1.25) | −0.28 (−0.97, 0.41) |
| Recommended | 2.25 (1.83, 2.67) | 0.79 (0.09, 1.49) |
| METS*min/wk (per 100) | 0.15 (0.13, 0.18) | 0.05 (0.01, 0.10) |
Data in bold type indicate P values for race interaction < 0.001 for all comparisons (PA categories and continuous PA levels).
Models are adjusted age, sex, race/center, education, smoking status, alcohol intake, SBP, antihypertensive medication use, diabetes, total and HDL cholesterol levels, use of lipid-lowering medications, eGFR, and BMI.
Relative risk ratios for vitamin D deficiency [<20 ng/mL (<50 nmol/L)] vs adequate 25(OH)D by PA levels were derived from Poisson regression models.
β coefficients were derived from linear regression models and represent the differences (in ng/mL) in 25(OH)D levels by PA levels.
To convert 25(OH)D levels to nmol/L from ng/mL, multiply by 2.496.