Fig. 1.

Correlation matrix of peripheral blood and broncho-alveolar lavage biomarkers with HRCT finding scores. Values are for Spearman correlation coefficients; colors indicate strength and direction of correlations as shown by the scale on the right side. Bold numbers are for significant correlations, *p < 0.05, **p < 0.01. The line between the EMP and GGO category visually separates non-inflammatory/fibrotic from inflammatory HRCT findings. PBL Peripheral blood, BAL Broncho-alveolar lavage, HRCT High-resolution computed tomography, RET Reticulation/honeycombing, TBR Traction bronchiectasis, EMP Emphysema, GGO Ground glass opacities, CON Consolidations, NDL Parenchymal nodules, MOS Mosaic attenuation, LEU Leukocyte count, NEU Neutrophil fraction, LYM Lymphocyte fraction, NLR Neutrophil to lymphocyte ratio, EOS Eosinophil fraction, CRP C-reactive protein, LDH Lactate dehydrogenase, MAK Macrophage fraction