Table 1 The results of the linear regression analyses of the deformity correction during the study period (2005-2009)
Preoperative | Postoperative | Correction (%) | Coefficient (95% CI) | P-value | |
|---|---|---|---|---|---|
Cobb angle: | |||||
Whole study cohort | 55.8 ± 10.2 | 17.3 ± 7.7 | 38.4 (69) | ||
Period 1 | 57.3 ± 8.6 | 19.9 ± 7.2 | 37.4 (66) | ||
Period 2 | 59.4 ± 13.7 | 21.2 ± 8.4 | 38.2 (64) | ||
Period 3 | 54.6 ± 8.9 | 16.1 ± 9.5 | 38.5 (72) | ||
Period 4 | 53.2 ± 9.6 | 13.6 ± 3.9 | 39.6 (74) | ||
0.7 (-0.7/2.1) | 0.325 | ||||
LEVT: | |||||
Whole study cohort | 27.8 ± 6.7 | 8.9 ± 5.3 | 19 (68) | ||
Period 1 | 27.1 ± 6.3 | 9.2 ± 4.5 | 17.9 (66) | ||
Period 2 | 29.3 ± 9.4 | 10.4 ± 6 | 18.9 (64) | ||
Period 3 | 28 ± 5.3 | 9 ± 6.5 | 19 (68) | ||
Period 4 | 27.5 ± 6.2 | 7.6 ± 4.3 | 19.9 (71) | ||
0.6 (-0.4/1.7) | 0.237 | ||||
Sagittal profile: | Kyphosis restoration | ||||
Whole study cohort | 15.1 ± 8.1 | 19.1 ± 6.3 | 4 (24) | ||
Period 1 | 16.6 ± 9.1 | 16.2 ± 8.3 | -0.4 (2) | ||
Period 2 | 15 ± 6.9 | 19.8 ± 6.1 | 4.8 (32) | ||
Period 3 | 14.6 ± 9.1 | 19.9 ± 5.8 | 5.3 (36) | ||
Period 4 | 14.2 ± 7.7 | 20.1 ± 4.6 | 5.9 (41) | ||
1.9 (0.9/3) | < 0.001 | ||||
Vertebral rotation: | |||||
Whole study cohort | 18.4 ± 6.4 | 11.9 ± 6.2 | 6.5 (37) | ||
Period 1 | 16.6 ± 5.7 | 12.4 ± 6.2 | 4.2 (29) | ||
Period 2 | 18.9 ± 6.8 | 12.4 ± 5.9 | 6.5 (36) | ||
Period 3 | 19.8 ± 6.4 | 12.3 ± 5.7 | 7.5 (39) | ||
Period 4 | 18.8 ± 6.6 | 11 ± 6.3 | 7.8 (45) | ||
1.2 (0.6/1.8) | < 0.001 |