Clinical Study
Microdecompression versus Open Laminectomy and Posterior Stabilization for Multilevel Lumbar Spine Stenosis: A Randomized Controlled Trial
Table 4
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 | 71.30 | 1.69 | 94.57 | <0.001 | 1 month postoperative ODI | 50 | 15.42 | 3.59 | Preoperative ODI | 50 | 71.30 | 1.69 | 177.31 | <0.001 | 6 months postoperative ODI | 50 | 12.68 | 1.44 | Preoperative ODI | 50 | 71.30 | 1.69 | 237.4 | <0.001 | 12 months postoperative ODI | 50 | 10.52 | 0.88 |
| VAS for back pain | Preoperative VAS for back pain | 50 | 5.22 | 0.70 | 19.66 | <0.001 | 1 month postoperative VAS for back pain | 50 | 1.66 | 1.08 | Preoperative VAS for back pain | 50 | 5.22 | 0.70 | 42.41 | <0.001 | 6 month postoperative VAS for back pain | 50 | 0.66 | 0.55 | Preoperative VAS for back pain | 50 | 5.22 | 0.70 | 56.58 | <0.001 | 12 month postoperative VAS for back pain | 50 | 0.24 | 0.43 |
| VAS for leg pain | Preoperative VAS for leg pain | 50 | 9.86 | 0.35 | 71.28 | <0.001 | 1 month postoperative VAS for leg pain | 50 | 1.64 | 0.80 | Preoperative VAS for leg pain | 50 | 9.86 | 0.35 | 99.72 | <0.001 | 6 month postoperative VAS for leg pain | 50 | 0.32 | 0.55 | Preoperative VAS for leg pain | 50 | 9.86 | 0.35 | 178.92 | <0.001 | 12 month postoperative VAS for leg pain | 50 | 0.04 | 0.19 |
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