Participants
EVENT, SECONDARY
As a pragmatic trial, all residents in the facilities were put on the intervention for feasibility and practicality consideration, but the eligible population for the assessment of effectiveness was limited to those aged 55 years or older and had blood pressure measured at the baseline survey. The age limit was set to enhance the possibility to test the effect on the risk of major adverse cardiovascular event (MACE), the most important secondary outcome of the study, which increases with age.