Table 2. Preoperative and surgical data stratified by proximal junctional angle.
| Proximal junctional angle | Total (n=39) | <10 (n=23) | ≥10 (n=16) | P value |
|---|---|---|---|---|
| Staged | 13 (33.3%) | 5 (21.7%) | 8 (50%) | 0.135 |
| Vertebroplasty | 9 (23.1%) | 7 (30.4%) | 2 (12.5%) | 0.357 |
| Osteotomy | 0.477 | |||
| SPO | 4 (10.3%) | 2 (8.7%) | 2 (12.5%) | |
| Multiple SPO | 10 (25.6%) | 5 (21.7%) | 5 (31.2%) | |
| PSO | 24 (61.5%) | 16 (69.6%) | 8 (50%) | |
| VCR | 1 (2.56%) | 0 (0%) | 1 (6.25%) | |
| Length of stay | 7.42 (±4.27) | 7.48 (±4.79) | 7.33 (±3.5) | 0.915 |
| Surgery approach | 0.765 | |||
| Anterior/posterior | 27 (69.2%) | 15 (65.2%) | 12 (75%) | |
| Posterior | 12 (30.8%) | 8 (34.8%) | 4 (25%) | |
| Estimated blood lose | 1,483 (±740) | 1,338 (±621) | 1,691 (±863) | 0.173 |
| Intra-operative PRBC | 2.82 (±2.04) | 2.93 (±2.04) | 2.67 (±2.09) | 0.705 |
| Surgery duration | 554 (±141) | 529 (±138) | 591 (±142) | 0.194 |
| Below T6 | 29 (74.4%) | 17 (73.9%) | 12 (75%) | 1 |
| Posterior levels fused | 10.3 (±2.78) | 10.3 (±2.72) | 10.4 (±2.94) | 0.94 |
| Anterior levels fused | 1.96 (±0.71) | 1.87 (±0.74) | 2.08 (±0.669) | 0.434 |
| Number of hooks used | 1.44 (±0.68) | 1.39 (±0.58) | 1.5 (±0.816) | 0.651 |
| Surgical complications | 10 (25.6%) | 6 (26.1%) | 4 (25%) | 1 |
| Medical complications | 17 (43.6%) | 10 (43.5%) | 7 (43.8%) | 1 |
| ALIF | 27 (69.2%) | 15 (65.2%) | 12 (75%) | 0.765 |
SPO, Smith Peterson osteotomy; PSO, pedicle subtraction osteotomy; VCR, vertebral column resection; PRBC, packed red blood cells; ALIF, anterior lumbar interbody fusion.