Perioperative outcomes by BMI group.
|
Characteristic | Nonobese (N = 74) | Obese I (N = 27) | Obese II (N = 19) | Obese III (N = 8) | P Valuea |
| Number of fusion levels, % (n) | 0.816 | ||||
| 1-Level | 50.0% (37) | 63.0% (17) | 57.9% (11) | 75.0% (6) | |
| 2-Level | 36.5% (27) | 29.6% (8) | 36.8% (7) | 25.0% (2) | |
| 3-Level | 12.2% (9) | 3.7% (1) | 5.3% (1) | 0.0% (0) | |
| 4-Level | 1.4% (1) | 3.7% (1) | 0.0% (0) | 0.0% (0) | |
| Operative time, min, mean ± SD | 60.5 ± 16.2 | 55.1 ± 17.8 | 56.5 ± 16.0 | 62.3 ± 20.3 | 0.441 |
| Estimated blood loss, mL,mean ± SD | 29.5 ± 12.0 | 30.2 ± 13.0 | 32.9 ± 14.6 | 35.0 ± 21.9 | 0.578 |
| Length of stay, h,mean ± SD | 13.1 ± 12.1 | 11.4 ± 14.8 | 15.0 ± 10.6 | 11.4 ± 7.4 | 0.786 |
| Discharge date, % (n) | 0.081 | ||||
| POD 0 | 74.3% (55) | 85.2% (23) | 63.2% (12) | 75.0% (6) | |
| POD 1 | 20.3% (15) | 11.1% (3) | 36.8% (7) | 25.0% (2) | |
| POD 2 | 5.4% (4) | 0.0% (0) | 0.0% (0) | 0.0% (0) | |
| POD 3+ | 0.0% (0) | 3.7% (1) | 0.0% (0) | 0.0% (0) |
aP value was calculated for each category using multivariate linear regression (continuous) or either χ2 analysis or Fisher’s exact test (categorical).
POD, postoperative day; SD, standard deviation.