From a The BMJ online editorial:
The proportion of patients who have two or more medical conditions simultaneously is, however, rising steadily. This is currently termed multimorbidity, although patient groups prefer the more intuitive “multiple health conditions.” In high income countries, multimorbidity is mainly driven by age, and the proportion of the population living with two or more diseases is steadily increasing because of demographic change. This trend will continue.
Cluster medicine
The cluster around diabetes is a good example, with the common serious disease affecting the heart, nervous system, skin, peripheral vasculature, and eyes. Diabetologists already provide care for the cluster of multiorgan diseases around diabetes, and some specialties, such as geriatrics or general practice, have multimorbidity at their heart. For most, however, training and service organisation are not optimised to face a multimorbidity dominated future.
The shift includes moving from thinking about multimorbidity as a random assortment of individual conditions to recognising it as a series of largely predictable clusters of disease in the same person. Some of these clusters will occur by chance alone because individuals are affected by a variety of commonly occurring diseases. Many, however, will be non-random because of common genetic, behavioural, or environmental pathways to disease. Identifying these clusters is a priority and will help us to be more systematic in our approach to multimorbidity.
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