Written Behavioural Persuasion Technique Intervention for Hypertension Management

Not Applicable

Completed

• Conditions: Hypertension; Behavior and Behavior Mechanisms
• Interventions: Behavioral: Written persuasive leaflet; Behavioral: Standard referral leaflet

• Registration Number: NCT05966597
• Lead Sponsor: Monash University Malaysia

Brief Summary

This study aims to examine the feasibility and effectiveness of written behavioural persuasion techniques intervention to encourage treatment initiation and follow-up for hypertension management among the untreated hypertension population of the SEACO cohort.

Detailed Description

Each household is given a unique identifier called house_id in the SEACO database. The randomisation will be computer-generated according to their house_id with a ratio of 1:1. During the house visit, participants' blood pressure will be taken three times, and the final reading will be the average of the second and third readings. Participants will be assessed based on the inclusion and exclusion criteria, i.e., age 35 years and above, blood pressure reading and reported not being diagnosed with or treated for hypertension. At the end of the house visit, all participants will receive a standard referral leaflet, and participants randomised to the intervention group will receive an additional written behavioural persuasion leaflet.

Study Timeline

• Study First Submitted: 2023-07-20
• Study First Submitted QC: 2023-07-20
• Study First Posted: 2023-07-28
• Study Start: 2023-09-14
• Primary Completion: 2024-07-31
• Study Completion: 2024-07-31
• Status Verified: 2025-05
• Last Update Submitted: 2025-05-06
• Last Update Posted: 2025-05-09

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 893

Inclusion Criteria

• Age 35 and above
• Systolic blood pressure equal to or more than 140 mmHg
• Diastolic blood pressure equal to or more than 90 mmHg
• reported not being diagnosed with hypertension OR not being treated for hypertension

Exclusion Criteria

• Involve in other research projects
• decline to participate/reject

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Written persuasive leaflet	Standard referral leaflet	Participants will receive a written persuasive leaflet in addition to the standard referral leaflet.
Written persuasive leaflet	Written persuasive leaflet	Participants will receive a written persuasive leaflet in addition to the standard referral leaflet.
Standard referral leaflet	Standard referral leaflet	Participants will receive a standard referral leaflet.

Primary Outcome Measures

Name	Time	Method
12-item Health Literacy score	Follow-up after 4-6 weeks receiving the leaflet	12-item Health Literacy is a validated, self-reported instrument used to measure health literacy (HL). The index value for HL is obtained where 0 represents the lowest HL and 50 the highest HL
Number of participants who see a doctor because of high blood pressure	Follow-up after 4-6 weeks receiving the leaflet	The number of participants who see a doctor because of high blood pressure
Participants' intention to go see the doctor about their blood pressure (6-point Likert scale)	Follow-up after 4-6 weeks receiving the leaflet	6-point Likert scale (strongly agree, moderately agree, somewhat agree, somewhat disagree, moderately disagree, strongly disagree) to measure participants' intention to go see the doctor about their blood pressure - "I intend to go to the doctor about my blood pressure", "I plan to go to the doctor about my blood pressure", "I want to go to the doctor about my blood pressure")
Participants' awareness of receiving the written communication during the health visit and their perceptions of the leaflets (6-point Likert scale)	Follow-up after 4-6 weeks receiving the leaflet	6-point Likert scale (strongly agree, moderately agree, somewhat agree, somewhat disagree, moderately disagree, strongly disagree) to measure participants' awareness of receiving the leaflets during the health visit and their perceptions of the leaflets' content, usefulness, impact on seeking medical attention, and aesthetic appeal - "The leaflets contain useful information", "The leaflet was helpful. It made it easier for me to see a doctor and manage my blood pressure/ It would make it easier for me to see a doctor and manage my blood pressure", "The leaflet was persuasive. It made me want to see a doctor for my blood pressure", "I like the colour and design of the leaflet".

Secondary Outcome Measures

Name	Time	Method
Blood pressure status during clinic visit	Follow-up after 4-6 weeks receiving the leaflet	Participants' self-reported blood pressure status during the visit to the clinic/doctor (low, normal, high)
Time taken for clinic visit (week)	Follow-up after 4-6 weeks receiving the leaflet	Time taken (week) for participants to go see a doctor because of high blood pressure after receiving the leaflet

Trial Locations

Locations (1)

South East Asia Community Observatory, Monash University Malaysia; 🇲🇾 Segamat, Johor, Malaysia