In stratified analysis by BA severity, compared with BA patients without jaundice, those with jaundice had significantly decreased plasma IFN-γ levels (P = 0.016), whereas there were no significant differences in plasma levels of 4 remaining cytokines including IL-2, IL-12p70, IL-15, and IL-17 between the groups (Fig 2). This evidence concerns the gene IL15 and Jaundice.