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Salt Intake and Blood Pressure Control in Adults With Essential Hypertension

ClinicalTrials.gov IDNCT07025928

PhaseNA

Enrollment190

SponsorSun Jingfeng

Age21 Years

SexALL

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Conditions studied

Hypertension

About this study

The goal of this study is to explore the barriers and facilitators to adopting a reduced dietary salt and increased potassium intake among adults with essential hypertension in Singapore, and to evaluate the feasibility and preliminary effectiveness of a newly developed educational tool-Decreased Salt High Potassium (DSHP) Diet Tool-in reducing dietary sodium intake and increasing potassium intake. This three-part study will involve adults aged 21 years and above, with a self-reported diagnosis of hypertension for at least six months and/or currently taking antihypertensive medication. Participants will be recruited from two SingHealth Polyclinics (Punggol Polyclinic and Pasir Ris Polyclinic). Healthcare providers (HCPs) working at these clinics who have experience in managing patients with hypertension and in educating patients on reducing dietary sodium intake will also be recruited. The main questions this study aims to answer are: * What are the perceived barriers and facilitators for patients with hypertension to reduce dietary sodium and increase potassium intake? * What are the perceived barriers and facilitators experienced by healthcare providers in educating patients about sodium reduction and potassium intake? * Is the DSHP Diet Tool feasible and effective in reducing dietary sodium intake and increasing potassium intake among patients with hypertension? Participants in the intervention group will be provided DSHP Diet Tool and Decreased Salt High Potassium patient information leaflet (DSHP PIL). Participants in the control group will receive standard care and a patient information leaflet (DSHP PIL). Researchers will compare participants in the intervention group to the control group to determine whether the DSHP tool is effective in reducing dietary sodium and increasing potassium intake in patients with hypertension.

Interventions

Behavioral: Decreased Salt High Potassium Tool (DSHP Tool) — Participants in this arm will receive standard hypertension care and the Decreased Salt High Potassium (DSHP)Tool for 24 weeks. The DSHP Tool is an educational resource which includes a sodium intake calculator and tracker, potassium-rich food lists, risk matrix visuals, goal-setting modules tailored to the Singaporean diet. Participants will also receive the DSHP Patient Information Leaflet (PIL) .

Primary outcomes

24 hour Urinary Sodium level (At baseline and at the end of the intervention (24 weeks))
24 hour urinary potassium level (at baseline and at the end of intervention (24 weeks))

Eligibility information

Inclusion Criteria for patients: * Participants who are 21 years old and above. * Participants who self-reports to have hypertension for at least six months and/ or taking at least one type of antihypertensive medication daily for at least six months * Able to read English Exclusion Criteria for patients: * Participants with type 1/ type 2 or secondary diabetes mellitus * Participants with CKD stage 3B and above * Participants with serum potassium of above 4.5mmol/L (on the latest blood test) * Participants with serum sodium of less than 135 mmol/L (on the latest blood test) * Participants who are on daily potassium chloride * Participants who are on diuretics (thiazide or thiazide like diuretics) * Participants who are pregnant * Participants who had been diagnosed with any terminal illnesses, visually impaired, disability or mental health related illnesses (visually impaired refers to individuals who self-report to have difficulty reading the wordings on the patient consent form, even with the use of visual aids) * Participants who are not clinically stable (Clinically stable patients are defined in this study as: * Has clinic BP 100-160/60-100 mmHg, Heart Rate (HR) 60-100 bpm * No recent hospitalizations (within the last 3 months) due to hypertensive emergencies, strokes, myocardial infarctions or other acute cardiovascular events * No recent symptoms such as severe dizziness, fainting, or chest pain) \*Participants who are on PRN potassium supplements is not an exclusion criteria Inclusion criteria for Healthcare providers: * HCPs who had prior experience in advising patients on dietary salt reduction * HCPs who self-reported to have ever treated patients with hypertension Exclusion criteria for healthcare providers -nil

Study locations

Jingfeng Sun, Singapore, Singapore 820681 Singapore

Before you participate: Varda Clinical is an independent discovery tool, not the study sponsor or a medical provider. Eligibility can only be determined by the official study team. Discuss potential risks and benefits with a qualified healthcare professional.

Source: ClinicalTrials.gov. Record last refreshed by Varda Clinical: 2026-09-27.