Fig. 2From: Associations between serum biomarkers of cartilage metabolism and serum hyaluronic acid, with risk factors, pain categories, and disease severity in knee osteoarthritis: a pilot studyTukey’s box-and-whisker plots showing the biomarker levels according to knee pain severity at rest (a-c) and during walking (d-f). Data are presented as medians (IQR). Kruskal Wallis test followed by Dunn’s multiple comparisons test was used for statistical analysis. Only statistically significant differences are shown and indicated with asterisks: * p < 0.05, ***p < 0.001, ****p < 0.0001Back to article page