<qa>  What will be used to compare the diabetic with the non-diabetic groupPharmacogenetic Data: The approach to analysis will be a case-control association study: SNPs within a gene will be combined to form haplotypes to provide more informative genotypes. Association studies of haplotypes will be done first, comparing the diabetic with the non-diabetic group. Modeling of contributions of multiple genes will also be conducted. When SNPs associated with antipsychotics induced diabetes are identified, their interactive effects will be analyzed by multiple logistic regression. 