From this first study set (D1/C1), three SNPs showed an association with T2D; KLF2 rs12459387 (P = 0.09, MAF = 0.12, OR = 0.75 with 95% CI = 0.53–1.05), KLF4 rs10759240 (P = 0.08, MAF = 0.52, OR = 0.83 with 95% CI = 0.67–1.02) and KLF5 rs11841945 (P = 0.04, MAF = 0.40, OR = 1.27 with 95% CI = 1.02–1.59). Here, KLF2 is linked to type 2 diabetes mellitus.