Figure 1From: Levels of neuropeptide Y in synovial fluid relate to pain in patients with knee osteoarthritis Comparison of pain and NPY concentrations of KOA patients with healthy participants. (p < 0.05: ▲ vs. Healthy control group; Intragroup KOA ★vs. No pain group, ■vs. Mild pain group, ●vs. Moderate pain group, ※vs. Strong pain group).Back to article page