BDNF and schizophrenia: In the “schizophrenia-female” group, we observed a significantly higher prevalence of the rs6265-T (V66M) variant in the BDNF gene (p = 0.0180, n = 47) and rs1944294-T (L21Stop) in the CDH2 gene (p = 0.0495, n = 47), with a decrease in the corresponding heterozygous variants (Table 2).