Statistical Analysis of Mortality Rates of Coronavirus Disease 2019 (COVID-19) Patients in Japan Across the 4C Mortality Score Risk Groups, Age Groups, and Epidemiological Waves: A Report From the Nationwide COVID-19 Cohort.
Hiroaki BabaSaori IkumiShotaro AoyamaTetsuo IshikawaYusuke AsaiNobuaki MatsunagaNorio OhmagariHajime KanamoriKoichi TokudaTakuya UedaEiryo KawakamiPublished in: Open forum infectious diseases (2022)
The present analysis showed that COVID-19 patients had a lower mortality rate in the most recent sixth wave period, even among patients ≥75 years old at very high risk.