Table 3– Correlation between high-resolution computed tomography (HRCT) score and impedance–pH findings (acid exposure time and impedance-detected reflux episodes) with the presence/concentration of pepsin and bile acids in saliva and bronchoalveolar lavage fluid (BALF) in idiopathic pulmonary fibrosis patients
HRCT scoreAcid exposure timeTotal number of reflux episodes
Presence of pepsin in saliva0.5260<0.0010.21930.0030.4007<0.001
Presence of bile acids in saliva0.4269<0.0010.14930.0170.52640.001
Concentration of bile acids in saliva0.25910.0130.01290.6060.07120.218
Presence of pepsin in BALF0.6033<0.0010.23440.0260.28450.013
Presence of bile acids in BALF0.46050.0010.36600.0040.45660.001
Concentration of bile acids in BALF0.38430.0240.04270.4980.35580.031