Fig. 2
From: Blood cell for the differentiation of airway inflammatory phenotypes in COPD exacerbations
scatter plots for correlations between eosinophil and neutrophil in sputum and blood. (a) Correlation between the percentage of sputum eosinophils and the percentage of blood eosinophils. (b) Correlation between the percentage of sputum eosinophils and the absolute blood eosinophil count (× 109/L). (c) Correlation between the percentage of sputum neutrophils and the percentage of blood neutrophils. (d) Correlation between the percentage of sputum neutrophils and the absolute blood neutrophils count (× 109/L)