Table 4 The mean differences of (VAS for leg pain) between pre-operative and post-operative assessments in four time periods
Study variables | Periods of assessment | N | Mean | SD | P-value |
|---|---|---|---|---|---|
VAS for back pain | VAS for back pain preoperatively | 30 | 9.53 | 0.50 | < 0.001* |
VAS for back pain 1 weeks postoperatively | 30 | 1.33 | 0.47 | ||
VAS for back pain 3 months postoperatively | 30 | 0.46 | 0.50 | ||
VAS for back pain 6 months postoperatively | 30 | 0.00 | 0.00 | ||
VAS for back pain 12 months postoperatively | 30 | 0.00 | 0.00 |