IFNG and systemic lupus erythematosus: Post-induction with intraperitoneal pristane (for group 2 only), there was a difference in IFNγ levels between normal control and SLE model groups (269.82 vs. 322.42 pg/mL; mean difference 52.59 pg/mL; 95% CI 31.23-73.96 pg/mL; p<0.001) (Figure 1A).