Clinical Study
Microdecompression versus Open Laminectomy and Posterior Stabilization for Multilevel Lumbar Spine Stenosis: A Randomized Controlled Trial
Table 5
The mean differences of ODI, VAS for back pain, and VAS for leg pain between preoperative and postoperative assessments three times.
| Study variables | Periods of assessment | N | Mean | SD | Paired t-test | value |
| ODI | Preoperative ODI | 50 | 72.24 | 2.38 | 84.07 | <0.001 | 1 month postoperative ODI | 50 | 16.72 | 4.07 | Preoperative ODI | 50 | 72.24 | 2.38 | 155.4 | <0.001 | 6 months postoperative ODI | 50 | 12.90 | 1.26 | Preoperative ODI | 50 | 72.24 | 2.38 | 179.73 | <0.001 | 12 months postoperative ODI | 50 | 10.20 | 1.62 |
| VAS for back pain | Preoperative VAS for back pain | 50 | 5.14 | 0.90 | 11.28 | <0.001 | 1 month postoperative VAS for back pain | 50 | 3.18 | 1.15 | Preoperative VAS for back pain | 50 | 5.14 | 0.90 | 23.21 | <0.001 | 6 month postoperative VAS for back pain | 50 | 1.68 | 0.84 | Preoperative VAS for back pain | 50 | 5.14 | 0.90 | 32.99 | <0.001 | 12 month postoperative VAS for back pain | 50 | 0.30 | 0.50 |
| VAS for leg pain | Preoperative VAS for leg pain | 50 | 9.86 | 0.35 | 77.65 | <0.001 | 1 month postoperative VAS for leg pain | 50 | 1.86 | 0.78 | Preoperative VAS for leg pain | 50 | 9.86 | 0.35 | 103.68 | <0.001 | 6 month postoperative VAS for leg pain | 50 | 0.38 | 0.60 | Preoperative VAS for leg pain | 50 | 9.86 | 0.35 | 128.21 | <0.001 | 12 month postoperative VAS for leg pain | 50 | 0.14 | 0.45 |
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