Figure 3From: Increased levels of soluble interleukin-6 receptor and CCL3 in COPD sputumUnivariate Correlation of COPD sputum sIL-6R with sputum neutrophil TCC/g. Univariate correlation between COPD sputum sIL-6R and neutrophil TCC/g. r represents the Spearman Rank correlation coefficient. Each dot represents the data for an individual patient.Back to article page