Fig. 1From: The association of delta neutrophil index with the prognosis of acute exacerbation of chronic obstructive pulmonary diseaseFlowchart shows identification of severe AECOPD patients who were admitted to a respiratory center. AECOPD = acute exacerbation of chronic obstructive pulmonary disease; CAP = community-acquired pneumonia; DNI = delta neutrophil indexBack to article page