Table 2.
Comparison of clinical outcomes of UBE and OLM for LDH
| UBE | OLM | p value | |
|---|---|---|---|
| Pre-op VAS back | 6.22 ± 1.5 | 6.33 ± 1.5 | 0.263 |
| Pre-op VAS leg | 7.93 ± 1.0 | 7.98 ± 1.0 | 0.808 |
| Post-op VAS back | 0.93 ± 0.7 | 0.85 ± 0.7 | 0.657 |
| Post-op VAS leg | 1.28 ± 1.0 | 1.27 ± 1.0 | 0.945 |
| Pre-op ODI | 70.15 ± 1.0 | 71.85 ± 8.4 | 0.815 |
| Post-op ODI | 14.5 ± 11.9 | 13.95 ± 11.5 | 0.549 |
| Improvement of VAS back (1 week) | 4.05 ± 1.6 | 1.25 ± 1.7 | 0.001* |
| Improvement of VAS back (12 months) | 5.28 ± 1.80 | 5.28 ± 1.80 | 0.504 |
| Improvement of VAS leg (1 week) | 5.86 ± 1.6 | 5.60 ± 1.5 | 0.326 |
| Improvement of VAS leg (12 months) | 6.65 ± 1.5 | 6.70 ± 1.4 | 0.914 |
| Improvement of ODI back (1 week) | 45.67 ± 12.3 | 45.18 ± 12.8 | 0.824 |
| Improvement of ODI (12 months) | 57.90 ± 13.5 | 58.17 ± 15.6 | 0.782 |
| Modified MacNab score (%) | 75.35 ± 0.5 | 68.46 ± 0.5 | 0.082 |
| OT | 70.15 ± 22.0 | 60.38 ± 15.5 | 0.002* |
| EBL | 34.67 ± 16.9 | 140 ± 57.8 | 0.001* |
| HS | 2.77 ± 1.2 | 6.37 ± 1.4 | 0.005* |
| Complications (%) | 3 (3.7) | 2 (3.3) | 0.640 |
UBE unilateral biportal endoscopy, OLM open lumbar microscopy, LDH lumbar disc herniation, VAS Visual Analogue Scale (0–10), ODI Oswestry Disability Index (0–100%), improvement, the difference between preoperative and postoperative results, modified MacNab (1, excellent; 2, good; 3, fair; 4, poor), OT operation time, EBL, estimated blood loss, HS hospital stay (days)
*p < 0.05