| Description: |
Summary: Background: Long term respiratory symptoms are reported following recovery of acute COVID-19 infection and residual lung abnormalities (RLA) on follow-up thoracic computed tomography (CT) after COVID-19 hospitalisation have been observed. It is unknown whether RLA are associated with epithelial lung injury. Methods: Plasma was sampled from the observational Post HOSPitalisation-COVID cohort at five months post-hospitalisation. Epithelial injury biomarkers Krebs von den Lungen-6 (KL-6), matrix metalloproteinase 7 (MMP-7), surfactant protein-D (SP-D) and surfactant protein-A (SP-A) were assayed. In those without follow-up CT, RLA at-risk was defined by percent predicted DLCO |