Table 2.
Correlation coefficient(r) between PI and other sagittal parameters in AS patients and controls
| Correlation coefficient(r) | PI | |||
|---|---|---|---|---|
| AS group | P value | Control group | P value | |
| PT | 0.506 | < 0.001* | 0.601 | < 0.001* |
| SS | 0.159 | 0.127 | 0.722 | < 0.001* |
| TK | 0.171 | 0.100 | 0.090 | 0.637 |
| TLK | −0.67 | 0.522 | −0.292 | 0.117 |
| LL | −0.135 | 0.194 | −0.540 | 0.002* |
| SVA | 0.090 | 0.389 | −0.163 | 0.389 |
| SPA | −0.504 | < 0.001* | −0.296 | 0.112 |
| SSA | −0.11 | 0.919 | 0.803 | < 0.001* |
| TPA | 0.533 | < 0.001* | 0.265 | 0.157 |
AS ankylosing spondylitis; PI Pelvic incidence; PT Pelvic tilt; SS Sacral slope; TK Thoracic kyphosis; TLK Thoracolumbar kyphosis; LL Lumbar lordosis; SVA Sagittal vertical axis; GK Global kyphosis; SPA spinopelvic angle; SSA spinosacral angle; TPA the first thoracic vertebra pelvic angle
*Statistically significant (P < 0.05)