Table 3.
The clinical outcomes of the two groups
| PE-PLIF (n = 30) |
Open PLIF (n = 30) |
p | ||
|---|---|---|---|---|
| VAS back pain | ||||
| Preoperation | 4.50 ± 1.23 | 4.23 ± 1.19 | 0.397 | |
| Postoperation | 1 week | 2.17 ± 0.69* | 3.33 ± 0.65* | < 0.001 |
| 1 month | 1.77 ± 1.83* | 2.10 ± 0.48* | 0.339 | |
| 3 months | 0.87 ± 0.63* | 1.63 ± 0.72* | < 0.001 | |
| 6 months | 0.67 ± 0.55* | 1.13 ± 0.35* | < 0.001 | |
| 12 months | 0.53 ± 0.51* | 1.03 ± 0.49* | < 0.001 | |
| Last | 0.67 ± 0.48* | 1.17 ± 0.38* | < 0.001 | |
| VAS leg pain | ||||
| Preoperation | 6.17 ± 1.02 | 6.20 ± 0.96 | 0.897 | |
| Postoperation | 1 week | 2.17 ± 0.65* | 2.53 ± 0.57* | 0.024 |
| 1 month | 1.17 ± 0.38* | 1.50 ± 0.51* | 0.006 | |
| 3 months | 1.00 ± 0.37* | 1.07 ± 0.52* | 0.570 | |
| 6 months | 0.67 ± 0.58* | 0.93 ± 0.45* | 0.044 | |
| 12 months | 0.60 ± 0.50* | 0.63 ± 0.49* | 0.795 | |
| Last | 0.53 ± 0.51* | 0.60 ± 0.49* | 0.610 | |
| ODI | ||||
| Preoperation | 45.17 ± 4.96 | 45.90 ± 5.38 | 0.585 | |
| Postoperation | 1 month | 22.03 ± 3.33* | 29.20 ± 4.99* | < 0.001 |
| 3 month | 15.10 ± 1.86* | 20.97 ± 4.49* | < 0.001 | |
| 6 months | 11.33 ± 2.38* | 13.23 ± 3.46* | 0.017 | |
| 12 months | 9.97 ± 2.27* | 9.90 ± 3.31* | 0.928 | |
| Last | 10.1 ± 2.36* | 9.73 ± 3.10* | 0.576 | |
| Satisfaction rate (%) | 96.7 | 96.7 | 1.000** | |
| Excellent | 5 | 9 | ||
| Good | 24 | 20 | ||
| Fair | 1 | 1 | ||
| Poor | 0 | 0 | ||
*, P < 0.05 compared to the preoperative data. **, results from fisher’s exact test. VAS Visual analog scale. ODI, Oswestry Disability Index