TCF7L2 and prediabetes syndrome: The T allele (OR = 1.66, 95% CI 1.05–2.63, p = 0.03) and TT genotype of the TCF7L2 rs7903146 (OR = 3.27, 95% CI 1.63–6.55, P = 0.0005) were associated with prediabetes.