Comparison of clinical outcomes between biportal and uniportal full-endoscopy techniques in lumbar spinal stenosis with bilateral symptoms

Figure 3 Clinical outcomes in both groups. A: Comparison of lower back pain scores between the two groups; B: Comparison of lower extremity pain (severe side) between the two groups; C: Comparison of lower extremity pain (mild side) between the two groups; D: Comparison of quality of life Oswestry Disability Index scores between the two groups. ^aP < 0.05: Means there was significant difference before and after operation (P < 0.05); ^bP < 0.05: Means there was significant difference between groups (P < 0.05). ODI: Oswestry Disability Index; VAS: Visual analogue scale.