Moreover, the allele frequencies of MICA*A4 (χ2 = 7.572, p = 0.006, pc = 0.030) and MICA*A9 (χ2 = 7.519, p = 0.006, pc = 0.031) in patients with schizophrenia were all different from those in healthy controls (p values <0.05 after adjusting the values). This evidence concerns the gene MICA and schizophrenia.