PT - JOURNAL ARTICLE AU - Ponsford, Mark J AU - Jefferies, Rhys AU - Davies, Chris AU - Farewell, Daniel AU - Humphreys, Ian R AU - Jolles, Stephen AU - Fairbairn, Sara AU - Lewis, Keir AU - Menzies, Daniel AU - Benjamin, Amit AU - Thaivalappil, Favas AU - Williams, Chris AU - Barry, Simon M TI - Burden of nosocomial COVID-19 in Wales: results from a multicentre retrospective observational study of 2508 hospitalised adults AID - 10.1136/thoraxjnl-2021-216964 DP - 2021 Dec 01 TA - Thorax PG - 1246--1249 VI - 76 IP - 12 4099 - http://thorax.bmj.com/content/76/12/1246.short 4100 - http://thorax.bmj.com/content/76/12/1246.full SO - Thorax2021 Dec 01; 76 AB - The burden of nosocomial SARS-CoV-2 infection remains poorly defined. We report on the outcomes of 2508 adults with molecularly-confirmed SARS-CoV-2 admitted across 18 major hospitals, representing over 60% of those hospitalised across Wales between 1 March and 1 July 2020. Inpatient mortality for nosocomial infection ranged from 38% to 42%, consistently higher than participants with community-acquired infection (31%–35%) across a range of case definitions. Those with hospital-acquired infection were older and frailer than those infected within the community. Nosocomial diagnosis occurred a median of 30 days following admission (IQR 21–63), suggesting a window for prophylactic or postexposure interventions, alongside enhanced infection control measures.