Demographics |
Advanced age |
Longer duration of COPD |
Disease characteristics |
History of COPD exacerbations |
COPD-related hospitalization within the previous year |
History of antibiotic treatment for respiratory disease |
Productive cough |
Chronic mucous hypersecretion |
Elevated peripheral blood eosinophils (≥300 cells/microL) |
More severe dyspnea or symptoms (eg, mMRC ≥2, CAT >10) |
Severe airflow obstruction (FEV1 <30% predicted) |
Use of theophylline |
Medications causing sedation or respiratory depression |
Opiates or opioids |
Benzodiazepines |
Gabapentinoids (eg, gabapentin, pregabalin) |
Comorbid diseases |
Concomitant asthma (asthma-COPD overlap) |
Ischemic heart disease |
Left ventricular diastolic dysfunction |
Diabetes mellitus |
Gastroesophageal reflux disease |
Pulmonary hypertension |