Table 3.
Simple linear regression analysis and multiple linear stepwise regression analysis (25-hydroxyvitamin D < 30 ng/mL) (n = 279).
| Variable | 25-hydroxyvitamin D (ng/mL) |
||||
|---|---|---|---|---|---|
| Simple linear regression analysis |
Multiple linear stepwise regression analysis |
||||
| R | P-value | β (95% CI) | t-value | P-value | |
| Age, yr | −0.12 | 0.05 | - | 0.41 | 0.68 |
| Lumbar spine BMD, g/cm2 | 0.06 | 0.19 | - | −0.62 | 0.54 |
| Femoral neck BMD, g/cm2 | 0.20 | <0.001 | 0.16 (0.78–12.17) | 2.24 | 0.03 |
| Albumin, g/dL | 0.24 | <0.001 | 0.21 (0.62–2.96) | 3.01 | <0.001 |
| Albumin-corrected calcium, mg/dL | 0.04 | 0.29 | - | 1.21 | 0.23 |
| Phosphate, mg/dL | 0.07 | 0.15 | - | 0.98 | 0.33 |
| Tartrate-resistant acid phosphatase 5b, mU/dL | −0.15 | 0.02 | - | −1.37 | 0.17 |
| Undercarboxylated osteocalcin, ng/mL | −0.08 | 0.12 | - | −0.86 | 0.39 |
| Existing fragility fracture | - | - | - | −1.56 | 0.12 |
| Fracture site | |||||
| Vertebral fracture | - | - | - | 1.57 | 0.12 |
| Hip fracture | - | - | - | −1.67 | 0.10 |
| Distal radius fracture | - | - | - | 0.17 | 0.87 |
| Proximal humerus fracture | - | - | - | −0.32 | 0.75 |
| Place of residence | |||||
| Home | - | - | - | −0.27 | 0.79 |
| Hospital | - | - | - | −0.83 | 0.41 |
| Facility | - | - | - | 0.78 | 0.44 |
R = correlation coefficient; β = standardized correlation coefficients (95% confidence interval [CI]); BMD, bone mineral density.