ABCG2 and schizophrenia: The “high inflammation” schizophrenia subgroup also had increased expression of ICAM1 (ANCOVA: RIN F(2,63) = 12.128, p < 0.001) and decreased expression of ABCG2 (ANCOVA: age F(2,62) = 10.935, p < 0.001) mRNA as compared to both the “low inflammation” schizophrenia subgroup (118% increase in ICAM1 and 22% decrease in ABCG2) and “low inflammation” control subgroup (166% increase in ICAM1 and 34% decrease in ABCG2).