Fig. 1From: A rapid, non-invasive tool for periodontitis screening in a medical care settingBiomarkers in oral rinse samples. (a) Albumin concentration (μg/ml); (b) Chitinase activity (AU); (c) Total protease activity (AU); (d) MMP-8 concentration (ng/ml). Concentrations and activities of the biomarkers are presented on a logarithmic scale (y-axis), separated for each periodontitis classification (x-axis). Total periodontitis combines moderate and severe cases. Each dot represents one patient, the horizontal bars in each graph display the medians and interquartile ranges (IQR). Differences across the three periodontitis classification groups (no/mild, moderate and severe periodontitis) were analyzed using Kruskal-Wallis tests, of which the p-value is presented in the bottom left corner of each graph. By using Mann-Whitney U tests, patients with total periodontitis were compared with patients with no/mild periodontitis; those with severe periodontitis were compared with patients without severe periodontitis. *p < 0.05, **p < 0.01, ***p < 0.001; AU Arbitrary Unit, NS Not SignificantBack to article page