Table 1.
Baseline study characteristics stratified by level of plasma 25(OH)D.
| Characteristic | ≥30 ng/mL (N=37) | 15-29.9 ng/mL (N=108) | <15 ng/mL (N=39) | p-value |
|---|---|---|---|---|
| Age, years | 42.2 (9.5) | 40.0 (12.2) | 38.2 (13.5) | 0.15 |
| Black, % | 0 | 5 | 55 | <0.001 |
| Female, % | 59 | 50 | 51 | 0.49 |
| BMI, kg/m2 | 25.8 (4.2) | 25.3 (3.7) | 25.1 (4.3) | 0.41 |
| Systolic BP, mmHg | 111 (12) | 110 (12) | 114 (10) | 0.21 |
| Diastolic BP, mmHg | 66 (8) | 66 (8) | 71 (6) | 0.006 |
| 24-hr urine sodium, mmol | 241 (87) | 217 (78) | 225 (79) | 0.43 |
| Basal RPF, ml/min/1.73m2 | 575 (125) | 590 (143) | 572 (97) | 0.99 |
Continuous variables are expressed as mean (standard deviation); categorical variables are expressed as %.
P-values were determined by univariate linear regression (for continuous variables), or the chi-square test (for categorical variables).