Table 4 Comparison of radiographic parameters comparisons between the Over-distraction and No-distraction groups.
Radiographic parameters | Over-distraction | No-distraction | p value* |
|---|---|---|---|
Index disc height (mm) | |||
Preoperative | 4.5 ± 1.1 | 5.2 ± 1.0 | < 0.001 |
Postoperative | 7.7 ± 1.1 | 6.6 ± 0.9 | < 0.001 |
Final follow-up | 4.8 ± 1.9 | 4.5 ± 1.8 | 0.35 |
Cranial adjacent disc height (mm) | |||
Preoperative | 5.7 ± 1.0 | 5.9 ± 0.9 | 0.38 |
Postoperative | 6.0 ± 1.0 | 6.0 ± 0.8 | 0.90 |
Final follow-up | 5.8 ± 1.0 | 6.0 ± 0.8 | 0.28 |
Caudal adjacent disc height (mm) | |||
Preoperative | 5.5 ± 1.3 | 5.6 ± 1.2 | 0.53 |
Postoperative | 5.8 ± 1.4 | 5.5 ± 1.2 | 0.23 |
Final follow-up | 5.4 ± 1.3 | 5.5 ± 1.1 | 0.76 |
Local Cobb angle | |||
Preoperative | 3.5° ± 5.8° | 5.2° ± 5.2° | 0.07 |
Postoperative | 9.8° ± 6.4° | 7.7° ± 5.0° | 0.04 |
Final follow-up | 5.2° ± 5.3° | 5.0° ± 4.7° | 0.86 |
C2–C7 cervical lordosis | |||
Preoperative | 13.6° ± 10.0° | 13.0° ± 10.2° | 0.75 |
Postoperative | 15.2° ± 10.0° | 14.0° ± 8.9° | 0.47 |
Final follow-up | 14.6° ± 8.8° | 13.1° ± 8.7° | 0.30 |
T1 slope | |||
Preoperative | 25.2° ± 7.2° | 24.1° ± 8.6° | 0.41 |
Postoperative | 28.0° ± 8.3° | 25.3° ± 8.1° | 0.05 |
Final follow-up | 25.0° ± 9.2° | 24.0° ± 9.6° | 0.54 |
TS–CL | |||
Preoperative | 11.6° ± 10.3° | 11.0° ± 9.8° | 0.74 |
Postoperative | 12.9° ± 9.8° | 11.3° ± 8.3° | 0.29 |
Final follow-up | 10.4° ± 10.1° | 11.0° ± 9.6° | 0.74 |
Neck tilt | |||
Preoperative | 26.8° ± 31.9° | 34.5° ± 31.1° | 0.14 |
Postoperative | 48.9° ± 10.9° | 50.1° ± 15.4° | 0.59 |
Final follow-up | 49.9° ± 11.5° | 51.9° ± 11.0° | 0.28 |
Thoracic inlet angle | |||
Preoperative | 76.6° ± 10.7° | 74.0° ± 16.3° | 0.28 |
Postoperative | 77.0° ± 11.6° | 75.5° ± 17.8° | 0.54 |
Final follow-up | 74.9° ± 11.7° | 75.9° ± 13.1° | 0.62 |
cSVA (mm) | |||
Preoperative | 19.7 ± 14.7 | 22.3 ± 16.8 | 0.34 |
Postoperative | 25.8 ± 19.6 | 19.8 ± 11.2 | 0.03 |
Final follow-up | 17.3 ± 12.4 | 18.9 ± 20.3 | 0.56 |
