Table 1.
Baseline characteristics in group A and group B
| Characteristic | Group A (n = 14) | Group B (n = 40) | P value |
|---|---|---|---|
| Age at surgery, mean (SD), years | 73.0 (5.5) | 74.2 (6.0) | 0.55 |
| Female, n (%) | 14 (100) | 36 (90) | 0.28 |
| BMI, mean (SD), kg/m2 | 20.5 (3.6) | 23.6 (4.0) | 0.01 |
| Diagnosis, n (%) | 0.18 | ||
| Degenerative scoliosis | 4 (28.6) | 12 (30) | |
| Degenerative kyphosis | 4 (28.6) | 8 (20) | |
| Degenerative kyphoscoliosis | 2 (14.3) | 8 (20) | |
| Posttraumatic kyphosis | 2 (14.3) | 10 (25) | |
| Posttraumatic kyphoscoliosis | 0 | 2 (5) | |
| Iatrogenic kyphosis | 2 (14.3) | 0 | |
| BMD YAM, mean (SD), % | 92.9 (21.6) | 96.2 (21.0) | 0.62 |
| Osteopenia or osteoporosis, n (%) | 6 (42.8) | 18 (45) | 1.0 |
| No. of preoperative treatment for osteoporosis, n (%) preoperative radiographic parameters | 6 (42.8) | 22 (55) | 0.54 |
| Sagittal vertical axis, mean (SD), mm | 103.4 (57.0) | 90.0 (48.6) | 0.39 |
| Pelvic tilt, mean (SD), degrees | 30.3 (9.7) | 27.7 (8.3) | 0.33 |
| Thoracic kyphosis, mean (SD), degrees | 15.0 (12.9) | 25.0 (17.4) | 0.07 |
| Lumbar lordosis, mean (SD), degrees | 8.9 (15.0) | 20.7 (16.1) | 0.09 |
| Pelvic incidence, mean (SD), degrees | 47.0 (3.3) | 50.1 (7.8) | 0.21 |
| PI-LL, mean (SD), degrees | 38.1 (12.8) | 29.5 (14.8) | 0.14 |
| UIV + 2 angle, mean (SD), degrees | 7.4 (5.2) | 3.7 (7.0) | 0.11 |