WHAT’S KNOWN? (what is already known about this subject?)
The severity of the COVID-19 pandemic is associated with the survival of individuals, and evaluating the level of severity, especially in individuals with chronic diseases, improves the quality of life and can reduce the mortality rates caused by this virus. The severity of the COVID-19 disease was divided into four stages, i.e., mild, moderate, extreme, and serious, in accordance with the Guidelines provided by the Ministry of Health, Labor and Welfare, Japan, on the Diagnosis and Treatment of Novel Coronavirus. There have been limited studies investigating between the severity of COVID-19 infection and the various demographic/clinical characteristics of individuals using an intelligent ensemble model. Thence, this study investigates to design an intelligent model that predicts the disease severity level by modeling the relationships between the severity of COVID-19 infection and the various demographic/clinical characteristics of individuals.