Impact of Self-monitoring of Salt Intake by Salt Meter in Hypertensive Patients

A randomized-controlled trial was conducted in hypertensive patients whose BP was uncontrolled (systolic BP ≥140 mmHg or diastolic BP ≥90 mmHg) despite therapy or antihypertensive-naïve. Patients were randomized to receive salt meter to use in conjunction with dietary education (group A) or receive education only (group B), and were followed up for 8 weeks. Dietary education was provided by certified dietician without awareness of patients' allocation. The primary endpoint was change in 24-hour urinary sodium excretion. Changes in BP, salt taste sensitivity threshold, cardio-ankle vascular index (CAVI), as well as motivation to maintain low salt diet were also analyzed.