Since a high AUC represents both high recall (related to low false negative rate) and high precision (associated with low false positive rate), where 0.5 denotes a bad classifier and 1, an excellent classifier, these results indicate that BMI, lnc-IL7R, PM2.5, PM10, and SO2 levels are excellent classifiers for accurate patient stratification and management triage for COPD-E in Taiwan. The gene discussed is IL7R; the disease is chronic obstructive pulmonary disease.