Abstract
Studies assessing the impact of total comorbidity burden on outcomes of COVID-19 in age- and sex-controlled analyses are lacking. Previous studies identified the following single comorbidities as risk factors for poor COVID-19 outcomes: coronary heart disease, congestive heart failure, cardiac arrhythmia, chronic obstructive pulmonary disease, cancer, and diabetes.1 In this nationwide study of Danish COVID-19 patients, we investigated if Charlson Comorbidity Index Score (CCIS) was associated with the risk of severe outcome and death.
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