Table 1.
Preoperative and postoperative values of measured parameters
| CD (N=25) | ANT (N=21) | CD versus ANT | Postoperative versus preoperative | |||
|---|---|---|---|---|---|---|
| CD | ANT | |||||
| Cobb angle (degrees) | Preoperative | 53.6±7.03 (45.0–65.0 | 49.5±6.71(45.0–65.0) | NS | ||
| S | S | |||||
| Postoperative | 16.2±6.6 (5.0–36.0) | 8.0±4.2 (0.0–15.0) | S1 | |||
| AVT (mm) | Postoperative | 50.4±16.5 (15.0–86.0) | 42.2±15.4 (22.0–86.0) | NS | ||
| S | S | |||||
| Postoperative | 4.6±12.6 (−28.0–27.0) | -0.5±7.0 (−18.0–16.0) | NS | |||
| AVR (degrees) | Preoperative | 21.4±6.3 (10.0–30.0) | 18.0±5.5 (10.0–30.0) | NS | ||
| NS | S | |||||
| Postoperative | 19.6±5.8 (10.0–30.0) | 5.3±4.4 (0.0–15.0) | S1 | |||
| LIV tilt (degrees) | Preoperative | 21.3±4.6 (13.0–30.0) | 18.2±5.4 (6.0–28.0) | NS | ||
| S | S | |||||
| Postoperative | 2.4±4.5 (−12.0–10.0) | 2.4±2.6 (−2.0–9.0) | NS | |||
| C7 shift (mm) | Preoperative | 6.5±16.5 (−30.0–40.0) | 5.2±11.8 (−15.0–40.0) | NS | ||
| S | S | |||||
| Postoperative | 10.6±12.8 (−40.0–18.0) | -1.8±7.6 (−20.0–10.0) | S | |||
| Rib cage shift (mm) | Preoperative | 48.1±30.5 (10.0–110.0) | 37.3±20 (10.0–105.0) | NS | ||
| S | S | |||||
| Postoperative | -25.3±20.6 (−75.0–15.0) | -19.5±10.7 (−35.0–0.0) | S | |||
| Sagittal Cobb angle Th4–Th12 (degrees) | Preoperative | 18.6±11.3 (−8.0–37.0) | 21.0-11.3 (4.0–33.0) | NS | ||
| NS | NS | |||||
| Postoperative | 19.5±7.7 (6.0–38.0) | 21.5±8.0 (8.0–34.0) | NS | |||
All the values are expressed as the mean ± SD followed by the minimum and maximum values in brackets AVT Apical vertebra transposition, AVR Apical vertebra rotation, LIV lowest instrumented vertebra, S difference significant at P<0.05, S1 difference significant at P<0.001, NS difference not significant, CD Cotrel-Dubousset group, ANT anterior surgery group