Table 3.
Stepwise multivariate logistic regression analysis with the presence of secondary hyperparathyroidism as dependent variable and potential risk factors as independent variables.
| Secondary hyperparathyroidism | Model χ 2 | Exp(B) | P value |
|---|---|---|---|
| Men and premenopausal women | |||
| Model 1 | |||
| Age (years) | 5.005 | 0.951 | 0.329 |
| Sex1 | 0.269 | 0.604 | |
| Current smoking | 2.362 | 0.124 | |
| 25-hydroxyvitamin D (ng/mL) | 0.869 | 0.037 | |
| Model 2 | |||
| Age (years) | 11.524 | 0.148 | 0.701 |
| Sex1 | 0.612 | 0.434 | |
| Current smoking | 6.966 | 0.013 | |
| Calcium (mg/dL) | 0.159 | 0.033 | |
| Model 3 | |||
| Age (years) | 10.082 | 1.753 | 0.186 |
| Sex1 | 1.096 | 0.295 | |
| Current smoking | 5.202 | 0.033 | |
| Magnesium (mg/dL) | 0.026 | 0.046 | |
| Postmenopausal women | |||
| Model 1 | |||
| Age (years) | 4.689 | 0.002 | 0.967 |
| YSM (years) | 1.132 | 0.038 | |
| Current smoking | 0.549 | 0.459 | |
| 25-hydroxyvitamin D (ng/mL) | 1.808 | 0.179 | |
| Model 2 | |||
| Age (years) | 5.879 | 0.840 | 0.359 |
| YSM (years) | 1.195 | 0.025 | |
| Current smoking | 0.414 | 0.520 | |
| Calcium (mg/dL) | 0.023 | 0.878 | |
| Model 3 | |||
| Age (years) | 3.745 | 0.992 | 0.907 |
| YSM (years) | 1.256 | 0.110 | |
| Current smoking | 3.240 | 0.383 | |
| Magnesium (mg/dL) | 1.876 | 0.768 |
YSM: years since menopause.
1Reference category: male sex.
Statistical significance was set at the level of P value <0.05.