Fig. 2From: Distinct metabolic features in the plasma of patients with silicosis and dust-exposed workers in China: a case–control studyPCA and OPLS-DA of the metabolic profiles of plasma samples in silicosis (SIL), dust-exposed workers (DEW) and healthy control (CON) groups. a PCA analysis in C18 mode. b PCA analysis in HILIC mode. c OPLS-DA analysis in C18 mode comparing DEW and CON. d OPLS-DA analysis in HILIC mode comparing DEW and CON. e OPLS-DA analysis in C18 mode comparing SIL and CON. f OPLS-DA analysis in HILIC mode comparing SIL and CONBack to article page