nominally significantP = 1.16e −2
There were no significant associations in the zero part of the Hurdle model for all metabolites analyzed. Second, the pathway enrichment analysis of 76 metabolites that were successfully matched to terms of the SMPDB database resulted in two nominally significant pathways: fatty acid biosynthesis and α-linolenic acid metabolism ( P = 1.16e −2 , P = 4.62e −2 ) ( Figure 4 ).