FOXP2 and schizophrenia: In this study, although we did not observe an interactive effect between sex and FOXP2 rs10447760 on cognitive deficits, we did find that FOXP2 rs10447760 interplayed with BMI to affect cognitive changes in schizophrenia patients: There was a positive correlation of BMI with language function only in schizophrenia patients with the FOXP2 rs10447760 CC genotype.