In the past 40 years, the amount of people with high blood pressure has almost doubled, surpassing 1.1 billion cases globally in 2015, according to a new study published in The Lancet.
For the analysis, World Health Organization researchers partnered with hundreds of scientists to examine 1,479 studies from 1975 to 2015 detailing the blood pressure of 19.1 million adults from across the world.
Here are four things to know.
1. The number of people with high blood pressure jumped from 594 million in 1975 to 1.13 billion in 2015.
2. High blood pressures rates dropped in wealthier countries and rose in poorer areas of the world.
3. South Korea, the United States and Canada had the lowest hypertension rates in the world, according to the report.
4. Adults living in Asia accounted for more than half of the total amount of people with high blood pressure in the world.
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