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Multiple regression analysis in AS patients
| Variables | Coefficient | t | P value |
|---|---|---|---|
| VAS | |||
| Sagittal vertical axis | 0.008 | 3.916 | <0.001 |
| Sacral slope | −0.050 | −3.856 | <0.001 |
| Constant | 4.700 | ||
| ODI | |||
| Sagittal vertical axis | 0.057 | 3.479 | <0.001 |
| Sacral slope | −0.297 | −2.997 | 0.003 |
| Constant | 37.309 | ||
| SRS-22 | |||
| Sagittal vertical axis | −0.002 | −3.648 | <0.001 |
| Lumbar lordosis | 0.008 | 2.310 | 0.023 |
| Constant | 3.055 | ||
| BASDAI | |||
| Sagittal vertical axis | 0.024 | 3.118 | 0.002 |
| Sacral slope | −0.174 | −3.686 | <0.001 |
| Constant | 13.895 | ||
