Table 4.
Breakdown of spondylolisthesis reduction and 12-month pain (VAS) by demographic and treatment variables.
| Grouping variable (n) | Slip reduction from preoperative (%) | 12-month VAS (mm) | ||||
|---|---|---|---|---|---|---|
| No | Yes | P | No | Yes | P | |
| Gender (female/male) | 67% (53) | 75% (10) | 0.228 | 2.2 (48) | 2.1 (10) | 0.933 |
| Obese | 68% (36) | 68% (27) | 0.925 | 2.1 (24) | 2.2 (34) | 0.840 |
| Smoke | 68% (47) | 67% (16) | 0.862 | 2.1 (44) | 2.2 (14) | 0.915 |
| Diabetes mellitus | 69% (54) | 62% (9) | 0.345 | 2.1 (50) | 2.4 (8) | 0.677 |
| Coronary artery disease | 68% (39) | 68% (24) | 0.934 | 1.9 (34) | 2.5 (24) | 0.249 |
| Chronic obstructive pulmonary disease | 69% (60) | 56% (3) | 0.273 | 2.2 (55) | 2.3 (3) | 0.856 |
| Steroid use | 67% (54) | 76% (9) | 0.149 | 2.1 (49) | 2.2 (9) | 0.916 |
| Cancer | 68% (56) | 70% (7) | 0.714 | 2.2 (52) | 2.0 (6) | 0.760 |
| Prior surgery | 69% (45) | 66% (18) | 0.680 | 2.1 (43) | 2.3 (15) | 0.800 |
| Levels treated (1 or 2) | 67% (49) | 71% (11) | 0.637 | 2.1 (44) | 2.6 (11) | 0.508 |
| Unilateral versus bilateral fixation (uni/bi) | 68% (53) | 70% (8) | 0.799 | 2.3 (49) | 1.7 (7) | 0.445 |
| Satisfaction | 49% (6) | 70% (50) | 0.011 | 5.7 (6) | 1.7 (45) | 0.016 |
| Redo | 43% (4) | 70% (52) | 0.008 | 5.3 (4) | 1.8 (47) | 0.041 |
VAS: visual analog scale, mm: millimeters, uni: unilateral, and bi: bilateral.