Diabetes mellitus (O.R. 3.5; <i>p</i> < 0.001) and COPD (O.R. 21.3; <i>p</i> < 0.001) were independent predictors for MG1-SSI; indexed proximal sternal height (iPSH) was as a protective factor (O.R. 0.26; <i>p</i> < 0.001) with a cut-off of 5.97 mm (sensitivity 70.2%, specificity 69.0%; ROC AUC = 0.739, <i>p</i> < 0.001). This evidence concerns the gene MUC5B and diabetes mellitus.