Summary of patient characteristics.
| Characteristic | Transversus Abdominis Plane (n = 47) | Control (n = 52) | P Value |
| Age | 58.0 (46.0–68.0) | 64.0 (52.5–69.0) | 0.099 |
| Body mass index | 30.5 ± 5.4 | 30.5 ± 5.8 | 0.977 |
| Sex | |||
| Men | 23 (48.9%) | 31 (59.6%) | 0.287 |
| Women | 24 (51.1%) | 21 (40.4%) | |
| Diabetes | 8 (17.0%) | 9 (17.3%) | 0.970 |
| Tobacco history | 17 (36.2%) | 23 (44.2%) | 0.414 |
| Drug abuse history | 2 (4.3%) | 6 (11.5%) | 0.274 |
| Previous pain management | 19 (40.4%) | 27 (51.9%) | 0.252 |
| No. of levels (rows) | 1.0 (1.0–2.0) | 1.0 (1.0–2.0) | 0.864 |
| Surgery type | |||
| ALIF | 17 (36.2%) | 20 (38.5%) | 0.814 |
| ALIF/PLIF | 30 (63.8%) | 32 (61.5%) |
Abbreviations: ALIF, anterior lumbar interbody fusion; PLIF, posterior lumbar interbody fusion.
Note: Data are presented as number (%), mean ± SD, or median (interquartile range).