Table 12. Simple and multivariate linear correlations between various spinopelvic and sacropelvic parameters in subjects < 50 years and subjects > 50 years of age.
| Linear regression models | Variable | R 2 | Beta coefficient standard error |
|---|---|---|---|
| <50 y | |||
| PI = 42.913 +0.283 SS | SS | 0.120 | 0.108 |
| LL = 43.438 + 0.113 TK | TK | 0.013 | 0.138 |
| >50 y | |||
| PI = 47.450 + 0.194 SS | SS | 0.116 | 0.078 |
| LL = 41.626 + 0.266 TK | TK | 0.101 | 0.116 |
Abbreviations: LL, lumbar lordosis; PI, pelvic incidence; PT, pelvic tilt; SS, sacral slope; TK, Thoracic kyphosis.