Clinical parameters
Only PROs showed moderate Pearson correlations with the paediatrician’s rattle score (GC-MS dataset: r=0.553, p<0.001; SIFT-MS dataset: r=0.561, p<0.001). This clinical parameter differed significantly between recovered, mild rattling, moderate rattling and severe rattling infants (GC-MS dataset: p<0.001; SIFT-MS dataset: p<0.001).