Table 1.
Patient Demographic Data.
| Control cohort (n = 124) | PVI cohort (n = 120) | P-value | |
|---|---|---|---|
| Gender (Male) | 36 (29.03%) | 44 (36.67%) | 0.204 |
| Age (year) | 67.75 (SD = 12.20) | 67.14 (SD = 12.01) | 0.695 |
| ASA score | 0.354 | ||
| 1 | 9 (7.26%) | 4 (3.33%) | |
| 2 | 80 (64.52%) | 77 (64.17%) | |
| 3 | 34 (27.42%) | 39 (32.50%) | |
| 4 | 1 (0.81%) | 0 (0.00%) | |
| Diabetes mellitus | 31 (25.00%) | 36 (30.00%) | 0.382 |
| Habits of smoking | 13 (10.48%) | 15 (12.50%) | 0.621 |
| Body mass index | 26.07 (SD = 4.27) | 27.05 (SD = 4.85) | 0.095 |
| Fusion Levels | 0.236 | ||
| 1 | 68 (54.84%) | 76 (63.33%) | |
| 2 | 45 (36.29%) | 40 (33.33%) | |
| 3 | 10 (8.06%) | 4 (3.33%) | |
| 4 | 1 (0.81%) | 0 (0.00%) | |
| Diagnosis | |||
| Control cohort (n = 124) | PVI cohort (n = 120) | P-value | |
| Degenerative spondylolisthesis | |||
| 63 (50.81%) | 55 (45.83%) | 0.437 | |
| Traumatic spondylolisthesis | |||
| 6 (4.84%) | 2 (1.67%) | 0.164 | |
| Spinal stenosis | |||
| 36 (29.03%) | 49 (40.83%) | 0.053 | |
| Pathological spondylolisthesis | |||
| 1 (0.81%) | 1 (0.83%) | 0.981 | |
| Isthmic spondylolisthesis | |||
| 17 (13.71%) | 8 (6.67%) | 0.070 | |
| Revision of previous operation | |||
| 1 (0.81%) | 5 (4.17%) | 0.090 | |
| Surgical outcomes | |||
| Control cohort (n = 124) | PVI cohort (n = 120) | P-value | |
| Blood loss (ml) | 377.9 (SD = 201.9) | 373.3 (SD = 244.8) | 0.873 |
| Operation time (hour) | 4.27 (SD = 1.27) | 4.09 (SD = 1.12) | 0.224 |
| Length of hospitalization (day) | 8.40 (SD = 6.63) | 7.02 (SD = 4.30) | 0.055 |
| Drainage tube insertion | 15 (12.10%) | 9 (7.50%) | 0.228 |
| Artificial bone material use | 58 (46.77%) | 70 (58.33%) | 0.071 |
| Postoperative antibiotics duration (day) | 3.18 (SD = 1.13) | 3.42 (SD = 1.45) | 0.154 |
Abbreviation: ASA = American society of anesthesiologists physical status classification system, BMI = body mass index, DM = diabetes mellitus.