Table 3 Anthropometric, biochemical markers of bone turnover and related variables of subjects according to serum 25(OH)D concentrations divided into 4 equal quartiles [mean (SD)]
Variable | 1st quartile 25(OH)D ≤15 ng/ml | 2nd quartile 25(OH)D =15.1–21.9 ng/ml | 3nd quartile 25(OH)D =22–30 ng/ml | 4th quartile 25(OH)D > 31.1 ng/ml | P value |
|---|---|---|---|---|---|
Weight (Kg) | 77.26 (17) | 79.51 (18) | 78.50 (17) | 79.67 (17) | 0.622 |
BMI | 28.93 (5) | 28.98 (5) | 28.07 (4) | 28.31 (5) | 0.423 |
SBP (mmHg) | 121.83 (16) | 125.62 (18) | 124.27 (15) | 124.67 (13) | 0.397 |
DBP (mmHg) | 74.67 (8) | 75.78 (7) | 77.34 (8) | 77.06 (7) | 0.089 |
HbA1C (%) | 5.72 (0.9) | 5.84 (1) | 5.60 (0.7) | 5.72 (1) | 0.196 |
Glucose (mmol/L) | 6.14 (2) | 6.48 (3) | 6.02 (1) | 6.00 (2) | 0.321 |
Hs CRP (mg/L) | 3.97 (4) | 3.38 (3) | 3.33 (3) | 3.10 (2) | 0.198 |
Cholesterol (mmol/L) | 4.79 (0.9) | 4.88 (0.9) | 4.88 (0.9) | 4.75 (0.9) | 0.541 |
HDL (mmol/L) | 1.32 (0.9) | 1.23 (0.4) | 1.27 (0.3) | 1.25 (0.3) | 0.494 |
LDL (mmol/L) | 3.22 (0.9) | 3.31 (0.8) | 3.26 (0.8) | 3.11 (0.8) | 0.239 |
Triglycerides (mmol/L) | 1.27 (0.8) | 1.48 (1) | 1.44 (1) | 1.36 (1) | 0.249 |
Calcium (mmol/L) | 2.28 (0.1) | 2.29 (0.1) | 2.28 (0.1) | 2.28 (0.1) | 0.881 |
Phosphate (mmol/L) | 1.17 (0.2) | 1.19 (0.1) | 1.21 (0.1) | 1.18 (0.1) | 0.369 |
Osteocalcin (ng/ml) | 17.92 (6) | 18.10 (7) | 17.45 (7) | 18.66 (11) | 0.666 |
PTH (pg/ml) | 28.70 (18) | 30.62 (18) | 27.73 (15) | 32.10 (43) | 0.446 |
P1NP (ng/ml) | 50.10 (23) | 49.90 (22) | 46.75 (21) | 50.98 (53) | 0.682 |
CTX1 (ng/ml) * | 11.58 (8) | 9.12 (5) | 12.45 (7) | 10.41 (6) | 0.034* |
U-DPD (nmol/L) | 101.53 (45) | 89.08 (47) | 88.53 (43) | 97.39 (50) | 0.526 |
U-PYD (nmol/L) | 232.94 (88) | 234.62 (89) | 221.59 (103) | 227.71 (100) | 0.914 |
PYD/Cr (nmol/mmol) | 24.43 (10) | 24.55 (12) | 22.94 (11) | 23.76 (12) | 0.910 |
DPD/Cr (nmol/mmol) | 11.05 (5) | 9.39 (5) | 9.44 (5) | 10.50 (6) | 0.534 |