Turning point in COVID-19 severity and fatality during the pandemic: a national cohort study in Qatar.

ABSTRACT:

Objective

To assess the evolution of COVID-19 severity and fatality in a unique setting that consistently applied, throughout the pandemic, rigorous and standardised criteria for defining severe COVID-19 outcomes.

Methods and analysis

We conducted a national cohort study on 312 109 Qatari citizens to investigate incidence of severe, critical or fatal COVID-19 classified according to the WHO criteria between 28 February 2020 and 21 April 2023. Incidence rates for severe, critical or fatal COVID-19 were estimated during the pre-omicron phase, first omicron wave, combined phases and throughout the pandemic.

Results

Cumulative incidence of severe, critical or fatal COVID-19 after 3.14 years of follow-up was 0.45% (95% CI 0.43% to 0.47%). Incidence rate for severe, critica

SUBMITTER: Chemaitelly H 

PROVIDER: S-EPMC11812731 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature