Table 1.
Background Characteristics in Each Group.
| Variables | Satisfied (n = 95) | Dissatisfied (n = 31) | P |
|---|---|---|---|
| Age, y, mean (SD) | 68.9 (11.0) | 70.9 (7.0) | .255 |
| Sex, male/female | 58/37 | 22/9 | .393 |
| BMI, kg/m2, mean (SD) | 23.8 (3.3) | 23.6 (3.5) | .861 |
| ASA grade, mean (SD) | 1.9 (0.5) | 2.0 (0.3) | .090 |
| Follow-up period, mo, mean (SD) | 24.6 (4.5) | 24.6 (3.9) | .318 |
| Drinker, % | 69.4 | 67.7 | 1.000 |
| Smoker, % | 10.5 | 29.0 | .015 |
| Anterior spondylolisthesis (+/−), n | 24/71 | 9/22 | .814 |
| Posterior spondylolisthesis (+/−), n | 21/74 | 10/21 | .336 |
| Low-grade scoliosisa (+/−), n | 13/82 | 12/19 | .004 |
Abbreviations: BMI, body mass index; American Society of Anesthesiologists.
a Scoliosis with a Cobb angle ≤15°.