The Sonography and Physical Findings on Shoulder after Selective Neck Dissection in Patients with Head and Neck Cancer: A Pilot Study

Figure 1

The correlation between the ratio of trapezius atrophy and the level of pain. Spearman correlation was used to analyze the relation between level of trapezius atrophy and pain. The X axis was the level of shoulder pain, which was assessed with VAS; the Y axis represented the ratio of trapezius atrophy that was calculated with the sonography results.