Follow-up and outcomes
HEART
Follow-up was scheduled for 6, 12, 18, and 24 months after randomization. The outcome assessment team was independent of the staff responsible for implementing the interventions. The primary efficacy outcome SBP at any scheduled follow-up visit during 24 months (except for participants in Xi’an where follow-up was conducted at 12 and 24 months, due to lack of personnel). Three measurements of blood pressure were recorded using an OMRON HEM-7136 device following American Heart Association guidelines [