Table 2 Before and after covariance analysis with age as covariate of radiographic parameters
Parameters | DDD group(42) | Normal group(199) | P value | |
|---|---|---|---|---|
before | after | |||
T1 tilt(°) | 22.90 ± 6.34 | 19.73 ± 6.08 | 0.003 | 0.065 |
maxTK(°) | 40.10 ± 11.25 | 36.15 ± 9.19 | 0.016 | 0.411 |
maxLL(°) | 41.43 ± 9.80 | 49.50 ± 9.49 | < 0.001 | < 0.001 |
maxLL-maxTK(°) | 1.33 ± 8.75 | 13.35 ± 9.22 | < 0.001 | < 0.001 |
SS(°) | 24.14 ± 7.03 | 33.22 ± 7.40 | < 0.001 | < 0.001 |
PT(°) | 24.19 ± 6.81 | 14.34 ± 7.15 | < 0.001 | < 0.001 |
PI(°) | 48.33 ± 11.17 | 47.56 ± 10.56 | 0.669 | 0.822 |
SS/PT(°) | 1.06 ± 0.36 | 3.04 ± 3.62 | < 0.001 | 0.001 |
SS-PT(°) | −0.05 ± 8.18 | 18.88 ± 10.02 | < 0.001 | < 0.001 |
LL-PI(°) | −6.90 ± 9.76 | 1.94 ± 9.90 | < 0.001 | < 0.001 |
SVA (mm) | 20.14 ± 20.84 | 2.4 ± 22.00 | < 0.001 | 0.001 |