Figure 2From: Sputum neutrophils as a biomarker in COPD: findings from the ECLIPSE study Bland Altman plots of the mean measurements at baseline and 1 year (x-axis) and the difference between the measurements (year 1 - baseline shown on y-axis) for (a) log10 sputum neutrophil numbers/ml and (b) sputum neutrophil % counts.Back to article page