HNF1A and type 2 diabetes mellitus: In detail, the CUBN rs2291521G > A variant was associated with total grey matter volume (OR and 95% CI were unknown; P = 3 × 10–6)39, and the HNF1A rs55783344C > T variant was associated with type 2 diabetes (OR = 1.07; 95% CI 1.04–1.11; P = 5 × 10–6)16.