When limiting the analysis to COPD patients (Table E1), only BMI (standardized β 0.44; P = 0.002), FFMI (standardized β 0.37; P = 0.009), and serum GDF‐15 (standardized β 0.31; P = 0.03) were associated with 8‐oxo‐dG levels, although none of these relationships were retained in a multivariate analysis. This evidence concerns the gene GDF15 and chronic obstructive pulmonary disease.