EPHX1 and chronic obstructive pulmonary disease: It was found that EPHX1 rs1051740 [homozygote model (OR = 1.409, 95% CI = 1.093–1.817, PZ = 0.008), recessive model (OR = 1.411, 95% CI = 1.116–1.784, PZ = 0.004) and allele model (OR = 1.203, 95% CI = 1.071–1.352, PZ = 0.002)] was significantly associated with COPD risk, consistent with findings from the overall analysis.