Table 2.
Association of serum calcium, 25(OH)D with lumbar bone mineral density
| Model 1 β (95% CI) |
Model 2 β (95% CI) |
Model 3 β (95% CI) |
|
|---|---|---|---|
| Serum calcium | − 0.029 (− 0.042, − 0.016) | − 0.028 (− 0.040, − 0.015) | − 0.019 (− 0.031, − 0.007) |
| Serum calcium (tertile) | |||
| T1 | Reference | Reference | Reference |
| T2 | 0.017 (− 0.031, − 0.004) | − 0.021 (− 0.034, − 0.008) | − 0.019 (− 0.033, − 0.006) |
| T3 | − 0.023 (− 0.036, − 0.010) | − 0.024 (− 0.036, − 0.012) | − 0.016 (− 0.029, − 0.004) |
| P for trend | < 0.001 | < 0.001 | 0.033 |
| Serum 25(OH)D | − 0.0002 (− 0.0008, 0.0003) | 0.0001 (− 0.0004, 0.0007) | 0.0011 (0.0005, 0.0017) |
| Serum 25(OH)D clinically relevant categories | |||
| < 20 (ng/mL) | Reference | Reference | Reference |
| 20–29.9 (ng/mL) | − 0.001 (− 0.013, 0.010) | 0.004 (− 0.007, 0.015) | 0.013 (0.002, 0.025) |
| ≥ 30 (ng/mL) | − 0.011 (− 0.024, 0.003) | − 0.004 (− 0.018, 0.009) | 0.020 (0.005, 0.034) |
| P for trend | 0.155 | 0.637 | 0.005 |
Model 1, no covariates were adjusted
Model 2, age, sex, race/ethnicity were adjusted
Model 3, age, sex, race/ethnicity, body mass index, education, income to poverty ratio, physical activity, smoking behavior, and alcohol consumption were adjusted