The astrocyte marker, GFAP mRNA, was strongly positively correlated with C1qA and C3 mRNAs in schizophrenia cases (r = 0.71 and 0.70, respectively) but not in control cases (r = 0.062 and 0.20, respectively) and these correlations were significantly different when comparing the diagnostic groups (C1qA: z = −2.87, p = 0.004, and C3: z = −2.33, p = 0.020, respectively). Here, C1QA is linked to schizophrenia.