Table 2. Mean leg pain levels preoperatively and at 6 weeks and 1 year postoperatively, using the VAS for pain.
| Cohorts | n | Pre-op | 6 weeks post-op | 1-year post-op | ∆6 weeks | ∆1 year | |||
|---|---|---|---|---|---|---|---|---|---|
| (95% CI) (%) | P value | (95% CI) (%) | P value | ||||||
| All | 119 | 6.76 | 2.42 | 3.44 | 4.34 (3.7–5.0) | <0.0001 | 3.33 (2.6–4.0) | <0.0001 | |
| Laminectomy | 70 | 6.87 | 2.51 | 3.23 | 4.36 (3.5–5.3) | <0.0001 | 3.64 (2.6–4.6) | <0.0001 | |
| Laminotomy | 49 | 6.62 | 2.3 | 3.7 | 4.32 (3.3–5.4) | <0.0001 | 2.90 (1.9–3.9) | <0.0001 | |
| Initial VAS back ≥5 | |||||||||
| Laminectomy | 40 | 7.1 | 3.28 | 3.48 | 3.83 (2.7–5.0) | <0.0001 | 3.63 (2.3–4.9) | <0.0001 | |
| Laminotomy | 31 | 7.32 | 2.71 | 4.1 | 4.61 (3.3–6.0) | <0.0001 | 3.23 (2.1–4.4) | <0.0001 | |
∆, change in score by. VAS, visual analogue scale.