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Correlation of postoperative change in segmental angle (n = 90) with the number of levels operated
| Number of levels operated | No. of patients | Mean segmental angle in neutral position | Difference per operated segment | ||
|---|---|---|---|---|---|
| Preoperative (SD) | Postoperative (SD) | Difference | |||
| 1 | 31 | 8.9 (7.3) | 4.2 (7.9) | 4.7 | 4.7 |
| 2 | 41 | 11.0 (8.5) | 6.8 (7.7) | 4.2 | 2.1 |
| 3 | 17 | 15.7 (10.8) | 9.2 (9.0) | 6.5 | 2.2 |
| 4 | 1 | 18.5 | 7.2 | 11.3 | 3.8 |
