In 2021, high blood pressure claimed 11·3 million lives globally.1 High blood pressure
has ranked consistently as the top modifiable risk factor globally for over 20 years.
Although its prevalence is universally high, awareness, management, and control of
high blood pressure are particularly poor in low-income and middle-income countries.2
Several cluster randomised controlled trials have shown that community health worker-led
interventions were effective in significantly reducing blood pressure in Argentina
(the HCPIA trial),3 Malaysia and Colombia (the HOPE 4 trial),4 and Bangladesh, Pakistan,
and Sri Lanka (the COBRA-BPS trial).