Figure 2 Violin plots comparing clinical outcomes between control and experimental groups at the 6-week follow-up. Subplots show the distributions of the change in ODI score (ΔODI), the PGIC score, and the change in NRS score (ΔNRS). The bottom-right panel presents a combined comparison of all 3 measures. The experimental group received radial ESWT combined with physical therapy; the control group received infrared therapy combined with physical therapy. In each violin plot, the central dashed line indicates the median, and dotted lines indicate the interquartile range. Statistically significant differences between groups are indicated by asterisks (*** P<0.001; **** P<0.0001). ODI – Oswestry Disability Index; PGIC – Patient Global Impression of Change; NRS – Numerical Rating Scale; ESWT – extracorporeal shock wave therapy.