Objective To determine the effects of salt reduction interventions designed for home cooks and family members.
Design Cluster randomised controlled trial.
Setting Six provinces in northern, central, and southern China from 15 October 2018 to 30 December 2019.
Participants 60 communities from six provinces (10 communities from each province) were randomised; each community comprised 26 people (two people from each of 13 families).
Interventions Participants in the intervention group received 12 month interventions, including supportive environment building for salt reduction, six education sessions on salt reduction, and salt intake monitoring by seven day weighed record of salt and salty condiments. The control group did not receive any of the interventions.
Main outcome measure Difference between the two groups in change in salt intake measured by 24 hour urinary sodium during the 12 month follow-up.
Results 1576 participants (775 (49.2%) men; mean age 55.8 (standard deviation 1