Although 70% of blood samples were taken at non-fasting state, we have compared RBP4 levels at blood donation by fasting status and performed stratified analysis, and found that neither RBP4 concentration nor the association with type 2 diabetes risk differed between the two groups, indicating that fasting status did not influence the associations in the present study. The gene discussed is RBP4; the disease is type 2 diabetes mellitus.