Comparison of COVID-19 pneumonia during the SARS-CoV-2 Omicron wave and the previous non-Omicron wave in a single facility.

In the Omicron wave group, patients in the pneumonia (+) group were older and more likely to be male and had higher rates of diabetes as comorbidity compared to the pneumonia (−) group; however, in the previous wave group, the difference in these indices between the pneumonia (+) and pneumonia (−) groups did not reach statistical significance.

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