ENPP1 and coronary artery disorder: With regard to the genotype analysis methods, ENPP1 K121Q showed a significant association with CHD risk using PCR-RFLP and TaqMan (PCR-RFLP: RR = 1.11, 95%CI = 1.00–1.22, P = .04; TaqMan: RR = 1.11, 95%CI = 1.00–1.22, P = .04), but not with MS-PCR (all P > .05) (Fig. 4F).