Table 3 Comparison of perioperative parameters in group A and group B
Parameter | Group A (n = 14) | Group B (n = 40) | P value |
|---|---|---|---|
Operation time, mean (SD), min | 282.1 (82.7) | 304.7 (79.4) | 0.37 |
Blood loss, mean (SD), mL | 698.6 (335.1) | 1128.0 (949.1) | 0.02 |
No. of levels fused, mean (SD) | 6.9 (2.7) | 7.6 (1.7) | 0.24 |
UIV implant types, n (%) | 0.30 | ||
Pedicle screws | 9 (64.3) | 22 (55) | |
Hooks | 3 (21.4) | 16 (40) | |
Unilateral pedicle screw and unilateral hook | 2 (14.3) | 2 (5) | |
No. of pedicle subtraction osteotomy, n (%) | 2 (14.2) | 12 (30) | 0.21 |
No. of fusion to sacrum, n (%) | 8 (57.1) | 28 (70) | 0.28 |
Immediate postoperative radiographic parameters | |||
Sagittal vertical axis, mean (SD), (mm) | 70.2 (29.6) | 63.2 (24.8) | 0.45 |
Pelvic tilt, mean (SD), (degrees) | 30.2 (9.9) | 25.4 (7.6) | 0.08 |
Thoracic kyphosis, mean (SD), (degrees) | 31.4 (16.8) | 31.4 (13.4) | 0.66 |
Lumbar lordosis, mean (SD), (degrees) | 26.0 (11.7) | 28.7 (11.3) | 1.0 |
Change in LL, mean (SD), degrees | 17.1 (17.0) | 10.0 (13.0) | 0.11 |
Pelvic incidence, mean (SD), degrees | 46.7 (2.9) | 49.5 (7.8) | 0.32 |
PI-LL, mean (SD), (degrees) | 22.2 (13.6) | 21.9 (7.8) | 0.94 |
UIV + 2 angle (SD), degrees | 8.9 (5.6) | 7.7 (7.9) | 0.52 |