Fig. 7From: Salivary microbiome and metabolome analysis of severe early childhood cariesBetween-group differences in the metabolic profiles. Principal component analysis (PCA) (a) and OPLS-DA analysis (b) of the salivary metabolic profiles. Values of log2 (FC) after between-group comparison (c). Positive and negative Log2 (FC) values indicate a relatively higher concentration in the SECC and CF groups, respectivelyBack to article page