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Temporal changes in the demographic profile of the patients admitted to the ICU due to COVID-19. (A) Individual age values (≥18 years old) are represented, along with median and 95% CI. The first wave includes the months of May, June, and July 2020; the second wave includes the months of December 2020, January 2021, and February 2021. (B) Total numbers of patients admitted to the ICU stratified by age group. **P < 0.001, ***P < 0.0001.
