BACKGROUND: COVID-19 significantly influences the overall patient status and, in severe symptomatology, the ability to move and the low oxygenation of the tissue for the ventilated patient in Intensive Care Units (ICU). There is a higher risk for Pressure injuries (PIs) development. OBJECTIVES: The nationwide analyses of the National health register aimed to compare the prevalence of PIs reported before the pandemic COVID-19 started and during the pandemic in 2020. METHOD: A retrospective, nationwide cross-sectional analysis of data regarding the STROBE checklist collected by the National Health Information System (NHIS), focusing on the PIs reporting based on the International Classification of Diseases (ICD-10) diagnoses L89.0-L89.9 for PIs in 2020. The data from the pandemic period of COVID-19 in 2020 were compared to the prevalence of PI cases in the period 2010-2019 in the Czech Republic in all hospitalized patients. RESULTS: The total number of admissions for L89 in 2020 was 14,441, of which 1509 (10.4%) also had COVID-19. In the ICU were 4386 admissions, 12.1% of which also had COVID-19. A higher proportion of PIs is observed in patients hospitalized with COVID-19 than in patients without COVID-19 (2.62% vs 0.81%, respectively 1.05% vs 0.46% when standardized to the 2013 ESP = European Standard Population). In patients hospitalized in ICU, 3.68% with COVID-19 had PIs vs 1.42% without COVID-19 had PIs (1.97% vs 0.81% using the 2013 ESP). CONCLUSION: The national health registers analyses have proven that the prevalence of PIs was higher among patients hospitalized with the SARS-CoV-2 infection.

Department of Dermatology University Hospital Ostrava 17 Listopadu 1790 5 Ostrava 708 00 Czech Republic

Department of Health Sciences Masaryk University Faculty of Medicine Kamenice 3 Brno 625 00 Czech Republic; Institute of Health Information and Statistics Palackého Náměstí 4 Prague 128 01 Czech Republic

Department of Health Sciences Masaryk University Faculty of Medicine Kamenice 3 Brno 625 00 Czech Republic; Institute of Health Information and Statistics Palackého Náměstí 4 Prague 128 01 Czech Republic; Czech National Centre for Evidence Based Healthcare and Knowledge Translation Institute of Biostatistics and Analyses Faculty of Medicine Masaryk University Kamenice 3 Brno 625 00 Brno Czech Republic

Department of Health Sciences Masaryk University Faculty of Medicine Kamenice 3 Brno 625 00 Czech Republic; Institute of Health Information and Statistics Palackého Náměstí 4 Prague 128 01 Czech Republic; Czech National Centre for Evidence Based Healthcare and Knowledge Translation Institute of Biostatistics and Analyses Faculty of Medicine Masaryk University Kamenice 3 Brno 625 00 Brno Czech Republic; Department of Public Health Masaryk University Faculty of Medicine Kamenice 3 Brno 625 00 Czech Republic

Department of Public Health Masaryk University Faculty of Medicine Kamenice 3 Brno 625 00 Czech Republic; Department of Rehabilitation University Hospital Brno Jihlavska 20 Brno 625 00 Czech Republic

Institute of Health Information and Statistics Palackého Náměstí 4 Prague 128 01 Czech Republic

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