Table 2 Baseline characteristics of women according to serum 25(OH)D level
Quartile (n) (ng/mL) | Quartile 1 (n = 487) (4.10–11.19) | Quartile 2 (n = 491) (11.20–15.59) | Quartile 3 (n = 484) (15.60–21.59) | Quartile 4 (n = 487) (21.60–54.90) | P value |
|---|---|---|---|---|---|
25(OH)D, ng/mL | 8.72 ± 1.67 | 13.28 ± 1.28 | 18.31 ± 1.70 | 28.15 ± 5.56 | < 0.001 |
Age, yr | 72.16 ± 4.68 | 71.07 ± 4.71 | 71.27 ± 4.35 | 71.45 ± 4.54*†‡ | 0.001 |
BMI, kg/m2 | 24.69 ± 2.92 | 25.07 ± 3.31 | 24.74 ± 3.11 | 23.58 ± 2.85*†‡ | < 0.001 |
Waist, cm | 83.49 ± 8.71 | 83.63 ± 9.13 | 83.14 ± 8.52 | 81.07 ± 8.54*†‡ | < 0.001 |
SBP, mmHg | 129.69 ± 15.75 | 128.51 ± 16.42 | 125.83 ± 15.46 | 124.69 ± 15.21* | 0.026 |
DBP, mmHg | 74.15 ± 7.96 | 73.32 ± 8.65 | 72.55 ± 8.75 | 72.96 ± 9.28 | 0.451 |
Current smoking | 7 (1.4) | 12 (2.4) | 5 (1) | 5 (1) | 0.216 |
Current drinking | 99 (23.2) | 91 (20.6) | 145 (28.4) | 137 (24) | 0.043 |
Exercise | 293 (60.2) | 308 (62.7) | 294 (60.7) | 294 (60.4) | 0.855 |
eGFR | 81.04 ± 15.49 | 82.51 ± 13.94 | 82.74 ± 13.23 | 83.68 ± 11.50* | 0.024 |
PTH | 46.36 ± 19.35 | 41.12 ± 14.40 | 37.70 ± 14.11 | 36.28 ± 13.80*† | < 0.001 |
Glucose, mg/dL | 96.11 ± 16.34 | 99.40 ± 20.33 | 98.17 ± 19.57 | 95.76 ± 15.56† | 0.004 |
Insulin, IU/L | 7.63 ± 4.79 | 8.09 ± 5.69 | 7.60 ± 5.07 | 6.85 ± 7.55† | 0.011 |
HOMA-IR | 1.85 ± 1.35 | 2.07 ± 1.67 | 1.89 ± 1.47 | 1.68 ± 2.23† | 0.005 |
Total cholesterol, mg/dL | 190.70 ± 38.79 | 185.70 ± 32.22 | 187.60 ± 36.56 | 180.07 ±34.45*‡ | < 0.001 |
Triglyceride, mg/dL | 143.47 ± 72.92 | 127.91 ± 61.37 | 128.05 ± 57.94 | 115.83 ± 51.41*†‡ | < 0.001 |
HDL cholesterol, mg/dL | 49.85 ± 12.58 | 51.63 ± 12.61 | 52.29 ± 12.13 | 52.30 ± 12.12* | 0.005 |
Number of MetS components | 2.65 ± 1.29 | 2.52 ± 1.30 | 2.50 ± 1.32 | 2.26 ± 1.31*†‡ | < 0.001 |