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“Causes of multimorbidity poorly understood and strategies for its prevention are lacking”

Increasing numbers of people worldwide are suffering life-long disability and dying prematurely due to the ineffective treatment of people with multiple health conditions, a report suggests.

The report from the Academy of Medical Sciences points to an alarming lack of information about multimorbidity, a scenario where a patient suffers several diseases simultaneously.

While it is well known that multimorbidity is common and on the rise, the exact extent of the problem and the rate at which it is growing is not understood.

It is reported to affect anywhere between 13-95% of patients globally, a range so wide that it indicates just how little is known about this global burden.

The causes of multimorbidity are poorly understood and strategies for its prevention are lacking.

The report, produced by a working group of 17 international health experts, is the first to address the problem of multimorbidity on a global scale and highlights the inadequacy of the evidence required to guide health policy and medical practice.

Most health services, including the NHS, are not designed to care for patients with multiple illnesses.

This is likely to contribute to the increasing pressures on health systems and budgets worldwide, the report suggests.

It concludes that without a better understanding of multimorbidity, it will not be possible for any country to plan future healthcare resources and redesign services effectively.

Health conditions that frequently group together include heart disease, high blood pressure, diabetes, cancer, depression, anxiety, chronic obstructive pulmonary disease (COPD) and chronic kidney disease.

However, it is unclear why some of these conditions cluster together, making it difficult to predict which patients may be most in need of preventive steps or increased care.

Evidence suggests multimorbidity is most common in women and people with low income, and is increasingly common in young people as well as in older people.

Professor Stephen MacMahon, Chair of the Academy of Medical Sciences multimorbidity working group, said: “While we know multimorbidity is very common, we don’t know precisely how many people live with multiple serious illnesses.

“From what we do know, I estimate tens of millions of Britons suffer from multimorbidity, and globally the number could be a billion. Similarly, while we know multimorbidity is increasing, we don’t know how quickly or which groups are experiencing the biggest increases.

“This report should be the tipping point of recognising that multimorbidity is an enormous threat to global health. It is a priority to get the evidence we need to develop effective strategies for prevention and treatment.”

The scientific community does not have an agreed definition of multimorbidity, which has hindered essential research needed to improve prevention and treatment.

The report provides a new definition of multimorbidity and recommends that this be adopted by researchers globally.

Professor Melanie Davies, member of the report working group, said: “We are all familiar with multimorbidity in the older population, but as a diabetes doctor I am seeing many type 2 diabetes patients under the age of 40 years with multiple serious illnesses which is a real concern.

“Our healthcare system is traditionally arranged around caring for single illnesses. With increasing recognition that treatment for patients with multimorbidity is often less effective, we are in desperate need of information to help us reorganise health services to deal with this challenge.”

The report highlights evidence that mental health conditions can lead to reduced physical health and vice versa. For example, type 2 diabetes has been reported to increase the risk of depression, and adults with depression are 37% more likely to develop type 2 diabetes.

However, the division between health services treating mental and physical health often means that patients suffering from both physical and mental conditions are at particular risk of poor care.

Read the full report here.

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