Critical care staffing ratio and outcome of COVID-19 patients requiring intensive care unit admission during the first pandemic wave: a retrospective analysis across Switzerland from the RISC-19-ICU observational cohort

STUDY AIM: The surge of admissions due to severe COVID-19 increased the patients-to-critical care staffing ratio within the ICUs. We investigated whether the daily level of staffing was associated with an increased risk of ICU mortality (primary endpoint), length of stay (LOS), mechanical ventilat...

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Main Authors: Marie-Madlen Jeitziner, André Moser, Pedro D Wendel-Garcia, Matthias Thomas Exl, Stefanie Keiser, Reto A. Schuepbach, Urs Pietsch, Sara Cereghetti, Filippo Boroli, Julien Marrel, Anne-Aylin Sigg, Hatem Ksouri, Peter Schott, Alexander Dullenkopf, Isabelle Fleisch, Antje Heise, Jean-Christophe Laurent, Stephan M. Jakob, Matthias P. Hilty , Yok-Ai Que
Format: Article
Language:English
Published: SMW supporting association (Trägerverein Swiss Medical Weekly SMW) 2022-06-01
Series:Swiss Medical Weekly
Online Access:https://smw.ch/index.php/smw/article/view/3220
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author Marie-Madlen Jeitziner
André Moser
Pedro D Wendel-Garcia
Matthias Thomas Exl
Stefanie Keiser
Reto A. Schuepbach
Urs Pietsch
Sara Cereghetti
Filippo Boroli
Julien Marrel
Anne-Aylin Sigg
Hatem Ksouri
Peter Schott
Alexander Dullenkopf
Isabelle Fleisch
Antje Heise
Jean-Christophe Laurent
Stephan M. Jakob
Matthias P. Hilty 
Yok-Ai Que
author_facet Marie-Madlen Jeitziner
André Moser
Pedro D Wendel-Garcia
Matthias Thomas Exl
Stefanie Keiser
Reto A. Schuepbach
Urs Pietsch
Sara Cereghetti
Filippo Boroli
Julien Marrel
Anne-Aylin Sigg
Hatem Ksouri
Peter Schott
Alexander Dullenkopf
Isabelle Fleisch
Antje Heise
Jean-Christophe Laurent
Stephan M. Jakob
Matthias P. Hilty 
Yok-Ai Que
author_sort Marie-Madlen Jeitziner
collection DOAJ
description STUDY AIM: The surge of admissions due to severe COVID-19 increased the patients-to-critical care staffing ratio within the ICUs. We investigated whether the daily level of staffing was associated with an increased risk of ICU mortality (primary endpoint), length of stay (LOS), mechanical ventilation and the evolution of disease (secondary endpoints). METHODS: We employed a retrospective multicentre analysis of the international Risk Stratification in COVID-19 patients in the ICU (RISC-19-ICU) registry, limited to the period between March 1 and May 31, 2020, and to Switzerland. Hierarchical regression models were used to investigate crude and adjusted effects of the critical care staffing ratio on study endpoints. We adjusted for disease severity and weekly caseload. RESULTS: Among the 38 participating Swiss ICUs, 17 recorded staffing information. The study population included 437 patients and 2,342 daily assessments of patient-to-critical care staffing ratio. Median of daily patient-to-nurse ratio started at 1.0 [IQR 0.5–1.5; calendar week 9] and peaked at 2.4 (IQR 0.4–2.0; calendar week 16), while the median of daily patient-to-physician ratio started at 4.0 (IQR 2.1–5.0; calendar week 9) and peaked at 6.8 (IQR 6.3–7.3; calendar week 19). Neither the patient-to-nurse (adjusted OR 1.28, 95% CI 0.85–1.93; doubling of ratio) nor the patient-to-physician ratio (adjusted OR 1.07, 95% CI 0.87–1.32; doubling of ratio) were associated with ICU mortality. We found no association of daily critical care staffing on the secondary endpoints in adjusted models. CONCLUSION: We found no association of reduced availability of critical care staffing resources in Swiss ICUs with overall ICU length of stay nor mortality. Whether long-term outcome of critically ill patients with COVID-19 have been affected remains to be studied.
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spelling doaj.art-4aedc5ef3f454ce99ea947a853da0e242024-11-02T17:26:02ZengSMW supporting association (Trägerverein Swiss Medical Weekly SMW)Swiss Medical Weekly1424-39972022-06-01152252610.4414/SMW.2022.w30183Critical care staffing ratio and outcome of COVID-19 patients requiring intensive care unit admission during the first pandemic wave: a retrospective analysis across Switzerland from the RISC-19-ICU observational cohortMarie-Madlen JeitzinerAndré MoserPedro D Wendel-GarciaMatthias Thomas ExlStefanie KeiserReto A. SchuepbachUrs PietschSara CereghettiFilippo BoroliJulien MarrelAnne-Aylin SiggHatem KsouriPeter SchottAlexander DullenkopfIsabelle FleischAntje HeiseJean-Christophe LaurentStephan M. JakobMatthias P. Hilty Yok-Ai Que STUDY AIM: The surge of admissions due to severe COVID-19 increased the patients-to-critical care staffing ratio within the ICUs. We investigated whether the daily level of staffing was associated with an increased risk of ICU mortality (primary endpoint), length of stay (LOS), mechanical ventilation and the evolution of disease (secondary endpoints). METHODS: We employed a retrospective multicentre analysis of the international Risk Stratification in COVID-19 patients in the ICU (RISC-19-ICU) registry, limited to the period between March 1 and May 31, 2020, and to Switzerland. Hierarchical regression models were used to investigate crude and adjusted effects of the critical care staffing ratio on study endpoints. We adjusted for disease severity and weekly caseload. RESULTS: Among the 38 participating Swiss ICUs, 17 recorded staffing information. The study population included 437 patients and 2,342 daily assessments of patient-to-critical care staffing ratio. Median of daily patient-to-nurse ratio started at 1.0 [IQR 0.5–1.5; calendar week 9] and peaked at 2.4 (IQR 0.4–2.0; calendar week 16), while the median of daily patient-to-physician ratio started at 4.0 (IQR 2.1–5.0; calendar week 9) and peaked at 6.8 (IQR 6.3–7.3; calendar week 19). Neither the patient-to-nurse (adjusted OR 1.28, 95% CI 0.85–1.93; doubling of ratio) nor the patient-to-physician ratio (adjusted OR 1.07, 95% CI 0.87–1.32; doubling of ratio) were associated with ICU mortality. We found no association of daily critical care staffing on the secondary endpoints in adjusted models. CONCLUSION: We found no association of reduced availability of critical care staffing resources in Swiss ICUs with overall ICU length of stay nor mortality. Whether long-term outcome of critically ill patients with COVID-19 have been affected remains to be studied. https://smw.ch/index.php/smw/article/view/3220
spellingShingle Marie-Madlen Jeitziner
André Moser
Pedro D Wendel-Garcia
Matthias Thomas Exl
Stefanie Keiser
Reto A. Schuepbach
Urs Pietsch
Sara Cereghetti
Filippo Boroli
Julien Marrel
Anne-Aylin Sigg
Hatem Ksouri
Peter Schott
Alexander Dullenkopf
Isabelle Fleisch
Antje Heise
Jean-Christophe Laurent
Stephan M. Jakob
Matthias P. Hilty 
Yok-Ai Que
Critical care staffing ratio and outcome of COVID-19 patients requiring intensive care unit admission during the first pandemic wave: a retrospective analysis across Switzerland from the RISC-19-ICU observational cohort
Swiss Medical Weekly
title Critical care staffing ratio and outcome of COVID-19 patients requiring intensive care unit admission during the first pandemic wave: a retrospective analysis across Switzerland from the RISC-19-ICU observational cohort
title_full Critical care staffing ratio and outcome of COVID-19 patients requiring intensive care unit admission during the first pandemic wave: a retrospective analysis across Switzerland from the RISC-19-ICU observational cohort
title_fullStr Critical care staffing ratio and outcome of COVID-19 patients requiring intensive care unit admission during the first pandemic wave: a retrospective analysis across Switzerland from the RISC-19-ICU observational cohort
title_full_unstemmed Critical care staffing ratio and outcome of COVID-19 patients requiring intensive care unit admission during the first pandemic wave: a retrospective analysis across Switzerland from the RISC-19-ICU observational cohort
title_short Critical care staffing ratio and outcome of COVID-19 patients requiring intensive care unit admission during the first pandemic wave: a retrospective analysis across Switzerland from the RISC-19-ICU observational cohort
title_sort critical care staffing ratio and outcome of covid 19 patients requiring intensive care unit admission during the first pandemic wave a retrospective analysis across switzerland from the risc 19 icu observational cohort
url https://smw.ch/index.php/smw/article/view/3220
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