Among three NOS3 gene polymorphisms tested by Narne et al. (2013) in Indian T2D patients, only the C allele carriers of –786T/C had significantly increased CHD risk (OR: 1.84, p = 0.004), but not for the NOS3 4b carriers of the intron 4a/b variant (OR: 0.98, p = 1.00) nor T allele carriers of G894T variants (OR: 1.35, p = 0.19) [59]. Here, NOS3 is linked to type 2 diabetes mellitus.