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ABSTRACT: Importance
Trends in COVID-19 severe outcomes have significant implications for the health care system and are key to informing public health measures. However, data summarizing trends in severe outcomes among patients hospitalized with COVID-19 in Canada are not well described.Objective
To describe trends in severe outcomes among patients hospitalized with COVID-19 during the first 2 years of the COVID-19 pandemic.Design, setting, and participants
Active prospective surveillance in this cohort study was conducted from March 15, 2020, to May 28, 2022, at a sentinel network of 155 acute care hospitals across Canada. Participants included adult (aged ≥18 years) and pediatric (aged 0-17 years) patients hospitalized with laboratory-confirmed COVID-19 at a Canadian Nosocomial Infection Surveillance Program (CNISP)-participating hospital.Exposures
COVID-19 waves, COVID-19 vaccination status, and age group.Main outcomes and measures
The CNISP collected weekly aggregate data on the following severe outcomes: hospitalization, admission to an intensive care unit (ICU), receipt of mechanical ventilation, receipt of extracorporeal membrane oxygenation, and all-cause in-hospital death.Results
Among 1 513 065 admissions, the proportion of adult (n = 51 679) and pediatric (n = 4035) patients hospitalized with laboratory-confirmed COVID-19 was highest in waves 5 and 6 of the pandemic compared with waves 1 to 4 (77.3 vs 24.7 per 1000 patient admissions). Despite this, the proportion of patients with positive test results for COVID-19 who were admitted to an ICU, received mechanical ventilation, received extracorporeal membrane oxygenation, and died were each significantly lower in waves 5 and 6 when compared with waves 1 through 4. Admission to the ICU and in-hospital all-cause death rates were significantly higher among those who were unvaccinated against COVID-19 when compared with those who were fully vaccinated (incidence rate ratio, 4.3 and 3.9, respectively) or fully vaccinated with an additional dose (incidence rate ratio, 12.2 and 15.1, respectively).Conclusions and relevance
The findings of this cohort study of patients hospitalized with laboratory-confirmed COVID-19 suggest that COVID-19 vaccination is important to reduce the burden on the Canadian health care system as well as severe outcomes associated with COVID-19.
SUBMITTER: Mitchell R
PROVIDER: S-EPMC10119741 | biostudies-literature | 2023 Apr
REPOSITORIES: biostudies-literature
Mitchell Robyn R Cayen Joelle J Thampi Nisha N Frenette Charles C Bartoszko Jessica J Choi Kelly Baekyung KB Comeau Jeannette L JL Conly John J Ellis Chelsey C Ellison Jennifer J Embil John J Evans Gerald G Johnston Lynn L Johnstone Jennie J Katz Kevin C KC Kibsey Pamela P Lee Bonita B Lefebvre Marie-Astrid MA Longtin Yves Y McGeer Allison A Mertz Dominik D Minion Jessica J Rudnick Wallis W Silva Anada A Smith Stephanie W SW Srigley Jocelyn A JA Suh Kathryn N KN Tomlinson Jen J Wong Alice A Pelude Linda L
JAMA network open 20230403 4
<h4>Importance</h4>Trends in COVID-19 severe outcomes have significant implications for the health care system and are key to informing public health measures. However, data summarizing trends in severe outcomes among patients hospitalized with COVID-19 in Canada are not well described.<h4>Objective</h4>To describe trends in severe outcomes among patients hospitalized with COVID-19 during the first 2 years of the COVID-19 pandemic.<h4>Design, setting, and participants</h4>Active prospective surv ...[more]