Studies investigate the meaning of ‘multimorbidity’ and how much it costs us

The prevalence of multimorbidity, the co-occurrence of two or more chronic conditions, varies depending on exactly how it is defined. And the health care costs associated with many disease combinations cost more together than the sum of each individual disease. Those are the conclusions of two new studies, published April 4 in the open access journal PLOS Medicine, that broadly analyze the concept and costs of multimorbidity.