Table 4: Radiological parameters for each type of surgery.
| Parameter | Non-fusion | Selective fusion | Whole fusion |
| Pre-op kyphotic angle | 22° (2°: 20°-25°) | 30° (7°: 18° -40°) | 16° (8°: 8°-22°) |
| Post-op kyphotic angle | 12°# (5°:+3°-15°) | 8° (6°: 0°-17°) | 5° (8°:+11°-12°) |
| Correction of kyphosis | 17° (9°: 10° - 23°) | 20° (9°: 8° - 30°) | 14° (4°: 10° - 18°) |
| Loss of kyphotic correction | 0°* (1°: 0° - 1°) | 11° (7°: 0° - 22°) | 1° (1°: 0° - 2°) |
| Pre-op AVBH | 43% (2%: 45%-50%) | 47% (6%: 41%-56%) | 72% (3%: 65%-77%) |
| Post-op AVBH | 97% (3%: 90%-100%) | 92% (4%: 92%-100%) | 96% (4%: 80%-100%) |
| Loss of AVBH correction | 1%* (1%: 0-2%) | 2% (1%: 0-4%) | 1% (1%: 0-2%) |
| ROM of non-fused segment | 11° * (3°:5°-16°) | 5° (1°:4°-6°) | NA |
Data represent median (IQR: range); #p < 0.01, compared with the other groups;
*p < 0.01, compared with the selective fusion group; Pre-op: Preoperative; Post-op: Postoperative; AVBH: Anterior vertebral body height; ROM: Range of motion; +3°: lordosis of 3°; 3°: kyphosis of 3°; NA: Not available.