Table 2. The operative comparison between the obese and non-obese groups.
| Operative factors | Obese group | Non-obese group | Statistical significance (P value) |
|---|---|---|---|
| Number of levels fused | 10.1 (SD 3.2) | 9.6 (SD 3.1) | 0.600 |
| Number of levels decompressed | 1.1 (SD 1.4) | 0.8 (SD 1.3) | 0.446 |
| Operative time (minutes) | 282.1 (SD 140.4) | 319.5 (SD 161.3) | 0.351 |
| Estimated blood loss (mL) | 1,916.0 (SD 1,032.0) | 1,099.0 (SD 694.2) | 0.001* |
| ICU length of stay (hours) | 32 (SD 31.7) | 29.5 (SD 37.2) | 0.784 |
| Hospital length of stay (days) | 13.2 (SD 13.4) | 11.3 (SD 3.2) | 0.451 |
| Surgical approach | |||
| Posterior | 29 (96.7%) | 28 (93.3%) | |
| Anterior | 0 | 0 | |
| Combined | 1 (3.3%) | 2 (6.7%) | |
| Osteotomy | |||
| Any osteotomy | 16 (53.3%) | 14 (46.7%) | 0.613 |
| 3 column osteotomy | 4 (13.3%) | 4 (13.3%) | 1.0 |
| 6 months radiographic parameters | |||
| Major cobb | 16.1 (SD 9.4) | 17 (SD 8.7) | 0.988 |
| Coronal balance | 23.4 (SD 16.5) | 16.2 (SD 11.8) | 0.120 |
| Sagittal balance | 45.3 (SD 40.9) | 19.3 (SD 33.1) | 0.034* |
| PI-LL mismatch | 8.9 (SD 16.8) | 7.7 (SD 11.1) | 0.778 |
*, P<0.05. ICU, intensive care unit; PI-LL, pelvic incidence minus lumbar lordosis.