Patients’ Demographics and Baseline Characteristics.
| Variable | ALIF (n = 32) | PLIF (n = 24) | P |
| Age, y | 80.5 ± 5.5 | 78 ± 7.8 | 0.182 |
| Gender, woman | 28 (87.5%) | 21 (87.5%) | >0.999 |
| BMI | 27 ± 3.6 | 28.1 ± 3.7 | 0.261 |
| ASA classification | |||
| 2 | 15 (46.9%) | 8 (33.3%) | 0.313 |
| 3 | 17 (53.1%) | 16 (66.7%) | |
| Preoperative Cobb angle | 29.3 ± 7.97 | 29.4 ± 8.6 | 0.985 |
Abbreviations: ALIF, anterior lumbar interbody fusion; ASA, American Society of Anesthesiologists; BMI, body mass index; PLIF, posterior lumbar interbody fusion.
Note: Data presented as mean ± SD or n (%).