Table 2. Differences in the levels of bone turnover markers in females in different serum 25(OH)D level groups.
| Parameter | Serum 25(OH)D concentration (ng/mL) | ||||
| <10 | 10–20 | 20–30 | >30 | p value | |
| n | 91 | 852 | 850 | 146 | |
| Age (years) | 43.1±16.9 | 41.7±15.8 | 42.1±16.0 | 44.6±15.1 | 0.209 |
| BMI | 21.1±2.4 | 21.9±3.6 | 22±2.8 | 22.3±2.6 | 0.261 |
| Albumin (g/L) | 49.9±2.6 | 50±2.6 | 49.9±2.5 | 50±3 | 0.731 |
| 25(OH)D (ng/mL) | 7.5 (4.0–8.9) | 16.5 (14.2–18.3) | 23.4 (21.6–26) | 33.3 (31.4–35.7) | <0.001 |
| PTH (pg/mL) | 38.7 (30.2–49.9)*** & | 35.4 (28.7–45.1)*** | 33.4 (26.6–43.1) ** | 29 (21.4–39.1) | <0.001 |
| β-CTX (pg/mL) | 350 (240–490)*** | 325 (222.5–470)*** | 290 (190–420) | 270 (180–435) | <0.001 |
| OC (ng/mL) | 18.6 (15.1–28.5)*** | 18.8 (14.5–24.8)*** | 16.7 (12.9–21.9)** | 15.3 (11.4–20.5) | <0.001 |
| P1NP (µg/L) | 42.0 (33.2–63.9)*** | 41.9 (32.6–55.3)*** | 38.3 (29.5–51.5)** | 34.9 (25.2–46.9) | <0.001 |
Notes: Normally distributed data are shown as mean ± standard. Data that are not normally distributed are shown as medians and inter-quartile ranges (in parentheses).
***
p<0.001 vs. 20–30 ng/mL and >30 ng/mL.
**
p<0.01 vs. >30 ng/mL.
&
p<0.05 vs. 10–20 ng/mL.