RT Journal Article SR Electronic T1 Pulmonary function test and computed tomography features during follow-up after SARS, MERS and COVID-19: a systematic review and meta-analysis JF ERJ Open Research JO erjor FD European Respiratory Society SP 00056-2022 DO 10.1183/23120541.00056-2022 VO 8 IS 2 A1 Christopher C. Huntley A1 Ketan Patel A1 Shahnoor-E-Salam Bil Bushra A1 Farah Mobeen A1 Michael N. Armitage A1 Anita Pye A1 Chloe B. Knight A1 Alyaa Mostafa A1 Marie Kershaw A1 Aishah Z. Mughal A1 Emily McKemey A1 Alice M. Turner A1 P. Sherwood Burge A1 Gareth I. Walters YR 2022 UL http://openres.ersjournals.com/content/8/2/00056-2022.abstract AB Background The COVID-19 pandemic follows severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS) coronavirus epidemics. Some survivors of COVID-19 infection experience persistent respiratory symptoms, yet their cause and natural history remain unclear. Follow-up after SARS and MERS may provide a model for predicting the long-term pulmonary consequences of COVID-19.Methods This systematic review and meta-analysis aims to describe and compare the longitudinal pulmonary function test (PFT) and computed tomography (CT) features of patients recovering from SARS, MERS and COVID-19. Meta-analysis of PFT parameters (DerSimonian and Laird random-effects model) and proportion of CT features (Freeman-Tukey transformation random-effects model) were performed.Findings Persistent reduction in the diffusing capacity for carbon monoxide following SARS and COVID-19 infection is seen at 6 months follow-up, and 12 months after MERS. Other PFT parameters recover in this time. 6 months after SARS and COVID-19, ground-glass opacity, linear opacities and reticulation persist in over 30% of patients; honeycombing and traction dilatation are reported less often. Severe/critical COVID-19 infection leads to greater CT and PFT abnormality compared to mild/moderate infection.Interpretation Persistent diffusion defects suggestive of parenchymal lung injury occur after SARS, MERS and COVID-19 infection, but improve over time. After COVID-19 infection, CT features are suggestive of persistent parenchymal lung injury, in keeping with a post-COVID-19 interstitial lung syndrome. It is yet to be determined if this is a regressive or progressive disease.A mild reduction in DLCO, and ground-glass opacity, linear opacities and reticulation on CT may persist after #COVID19 at 6 months: severe/critical COVID-19 acute infection increases this risk. Similar patterns observed after SARS and MERS. https://bit.ly/35u3ree