The number of adults aged 30–79 years with hypertension has increased from 650 million to 1.28 billion in the last thirty years, according to the first comprehensive global analysis of trends in hypertension prevalence, detection, treatment and control, led by Imperial College London and WHO. Nearly half these people did not know they had hypertension.

Hypertension significantly increases the risk of heart, brain and kidney diseases, and is one of the top causes of death and disease throughout the world. It can be easily detected through measuring blood pressure, at home or in a health centre, and can often be treated effectively with medications that are low cost.

The study, conducted by a global network of physicians and researchers, covered the period 1990–2019. It used blood pressure measurement and treatment data from over 100 million people aged 30–79 years in 184 countries, together covering 99% of the global population, which makes it the most comprehensive review of global trends in hypertension to date.

Also read: How to manage hypertension amidst Covid-19

Although it is straightforward to diagnose hypertension and relatively easy to treat the condition with low-cost drugs, the study revealed significant gaps in diagnosis and treatment. About 580 million people with hypertension (41% of women and 51% of men) were unaware of their condition because they were never diagnosed.

The study also indicated that more than half of people (53% of women and 62% of men) with hypertension, or a total of 720 million people, were not receiving the treatment that they need. Blood pressure was controlled, which means medicines were effective in bringing blood pressure to normal ranges, in fewer than 1 in 4 women and 1 in 5 men with hypertension.

Prof Majid Ezzati, senior author of the study and Professor of Global Environmental Health at the School of Public Health at Imperial College London, said: “Nearly half a century after we started treating hypertension, which is easy to diagnose and treat with low-cost medicines, it is a public health failure that so many of the people with high blood pressure in the world are still not getting the treatment they need.”

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