In the last 40 years, the number of people with high blood pressure has almost doubled, with the increase occurring primarily in low- and middle-income countries. Meanwhile, blood pressure levels have declined in high-income countries, according to a report from the NCD (noncommunicable diseases) Risk Factor Collaboration, an international group of hundreds of investigators.
The researchers pooled 1479 national, subnational, or community-based studies that measured the blood pressure of 19.1 million adults aged 18 years or older between 1975 and 2015 to estimate trends in 200 countries.
Friedrich M. Highest Blood Pressure Levels Shift From Rich to Poor Countries. JAMA. 2017;317(3):246. doi:10.1001/jama.2016.20449