Aim: Comorbidity is increasingly prevalent. Moreover, many different definitions and
interpretations of this phenomenon are used. Because of its social and clinical significance,
it is important that the concept is clear. In this review a summary of current uses of this
concept and relevant figures are given, as well as a proposal for future use. Method: A
computerised search and an additional literature search were performed to identify relevant
papers on comorbidity and related subjects. Available literature on the subject (nequals; 38) …