Figure 2

Correlation matrix of principal components and original variables associated with autoimmune manifestations. Correlation matrix of principal components and original variables sorted according to their associations with Sjögren's syndrome (SS) disease manifestations. The upper right triangle indicates significant P values with yellow fill (P < 0.05). The lower left triangle displays the corresponding r. Red indicates positive correlation and green negative correlation, and colour saturation indicates the strength of the association. Abbreviations not defined in the text: CRP, C-reactive protein; SAP, serum amyloid P.