ANKK1: ankyrin repeat and kinase domain containing 1; SNP: single-nucleotide polymorphism. Populations are arranged in ascending order of the values. bGenotype distributions of schizophrenia cases, with distributions of controls in parentheses. cThe distribution of the ANKK1 rs1800497 C allele is significantly different between schizophrenia cases and controls ( < 0.05). dThe distribution of the ANKK1 rs1800497 C allele does not differ between schizophrenia cases and controls ( > 0.05).