Radiographic, perioperative, and postoperative variables of patients undergoing TLIF vs PLF.
| Variables | TLIF (N = 591) | PLF (N = 259) | P Value |
| Radiographic | |||
| Disc height, mm, mean ± SD | 8.8 ± 3.2 | 8.8 ± 2.9 | 0.785 |
| Flexion-extension difference, n (%) | 68 (11.5) | 27 (10.4) | 0.555 |
| Flexion-extension measurement, mm, mean ± SD | 3.0 ± 2.6 | 2.7 ± 1.5 | 0.620 |
| Spondylolisthesis, n (%) | 413 (69.9) | 185 (71.4) | 0.341 |
| Grade 1 | 373 | 173 | |
| Grade 2 | 39 | 11 | |
| Grade 3 | 1 | 1 | |
| Perioperative | |||
| Estimated blood loss, cc, mean ± SD | 415.6 ± 300.8 | 381.7 ± 299.6 | 0.190 |
| Operative time, min, mean ± SD | 207.4 ± 58.7 | 203.6 ± 55.7 | 0.441 |
| Postoperative | |||
| Length of stay, d, mean ± SD | 2.8 ± 2.3 | 3.0 ± 1.4 | 0.110 |
| Discharged, n (%)a | 0.026 | ||
| Home | 510 (86.3) | 209 (80.7) | |
| Inpatient rehabilitation facility | 29 (4.9) | 26 (10.0) | |
| Skilled nursing facility | 14 (2.4) | 11 (4.2) | |
Abbreviations: PLF, posterolateral fusion; TLIF, transforaminal lumbar interbody fusion.
↵a 38 and 13 missing values in TLIF and PLF, respectively.