Table 2.
Comparison of preoperative and postoperative BMD values of all segments.
| BMD1 | BMD2 | Z | P values | |
|---|---|---|---|---|
| Cranial adjacent vertebrae (median [IQR]) | 153.6 (111.4-187.6) | 132.4 (105.3–164.0) | − 4.586 | < 0.001 |
| Upper instrumented vertebra (median [IQR]) | 139.3 (113.2-177.3) | 110.1 (71.1-143.7) | − 5.454 | < 0.001 |
| Injured vertebra (median [IQR]) | 182.3 (134.3-215.1) | 153.6 (118.1-199.4) | − 3.679 | < 0.001 |
| Lowest instrumented vertebra (median [IQR]) | 126.9 (101.8–158.0) | 110.6 (77.8-146.6) | − 5.116 | < 0.001 |
| Caudal adjacent vertebrae (median [IQR]) | 120.7 (94.2-155.8) | 111.1 (81.6-141.4) | − 4.913 | < 0.001 |
BMD bone mineral density, IQR interquartile range.