Abstract
This study evaluated the effectiveness of the Communication for Behavioral Impact (COMBI)–Eat Less Salt intervention conducted in Viet Tri, Vietnam. The behavior change intervention was implemented in four wards and four communes for one year, which included mass media communication, school interventions, community programs, and focus on high‐risk groups. Mean sodium excretion was estimated from spot urine samples using different equations. A subsample provided 24‐hour urine to validate estimates from spot urine. Information about salt‐related knowledge and behaviors was also collected. There were 513 participants at both baseline and follow‐up. Mean sodium excretion estimated from spot urines fell significantly from 8.48 g/d at baseline to 8.05 g/d at follow‐up (P=.001). All spot equations demonstrated a significant reduction in sodium levels; however, the change was smaller than the measured 24‐hour urine. Participants showed improved knowledge and behaviors following the intervention. The COMBI intervention was effective in lowering average population salt intake and improving knowledge and behaviors.
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