Fig. 5

PLS-DA analyses and ROC curves in both serum and saliva samples under different periodontal conditions. A C score plots of serum Raman spectra after PCA and PLS-DA analysis for PC1 and PC2 dimensions in H–H, PC-H, H-Perio and PC-Perio groups; G heat map of serum Raman spectra after PLS-DA analysis for cluster analysis of the selected PC; E adonis test for intergroup difference after PLS-DA for serum Raman spectra; I ROC curves to analyze the ability of salivary Raman spectra to discriminate between PCOS and periodontitis; B, D score plots of saliva Raman spectra after PCA and PLS-DA analysis for PC1 and PC2 dimensions in H–H, PC-H, H-Perio and PC-Perio groups; H heat map of saliva Raman spectra after PLS-DA analysis for cluster analysis of the selected PC; F adonis test for intergroup difference after PLS-DA for saliva Raman spectra; J ROC curves to analyze the ability of serum Raman spectra to discriminate between PCOS and periodontitis