Association between prognostic nutritional index and 90-day readmission in patients with acute exacerbation of chronic obstructive pulmonary disease: a multicenter study

BackgroundChronic obstructive pulmonary disease (COPD) is marked by chronic airway inflammation and obstructive ventilation dysfunction. The prognostic nutritional index (PNI), an indicator for evaluating nutritional and immune status with confirmed prognostic value in most diseases, has an unclear association with short-term acute re-exacerbation of COPD. This study thus investigated the corre...