Effectiveness of SMS Text Reminders to Improve Blood Pressure Among Patients With Hypertension
Objective: To test the primary hypothesis that SMS text messages delivered to patients via mobile phone can improve blood pressure within 12 weeks compared to usual care
Design: Parallel group, randomized, controlled trial; the patient is the unit of randomization
Setting: General Medicine Outpatient Continuity Clinic of the Philippine General Hospital and Private Outpatient Clinics near the Philippine General Hospital
Patients: Ambulatory men and women aged 19 years and older (N=700) with a diagnosis of essential hypertension, on maintenance blood pressure-lowering medications, who have daily access to a mobile phone in the household and know or live with someone who knows how to retrieve, read and reply to text messages using a mobile phone
Intervention: SMS text messages delivered twice a week for 12 weeks, which aim to 1) provide information regarding hypertension; 2) remind patients to take their medications.
Main Outcome Measure: The primary outcomes are the mean change in systolic and diastolic blood pressures at the end of 12 weeks. The secondary outcomes are improvement in blood pressure control rate and medication adherence.
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single Blind (Outcomes Assessor)
Primary Purpose: Treatment
|Official Title:||Effectiveness of SMS Text Reminders to Improve Blood Pressure Among Patients With Hypertension at a General Medicine Outpatient Clinic in a Tertiary Center in Manila, Philippines: A Randomized Controlled Trial|
- Mean Absolute Change in Systolic Blood Pressure After 12 Weeks [ Time Frame: baseline and 12 weeks ]Absolute change in systolic blood pressure from baseline to 12 weeks
- Mean Absolute Change in Diastolic Blood Pressure After 12 Weeks [ Time Frame: baseline and 12 weeks ]Absolute change in diastolic blood pressure from baseline to 12 weeks
- Medication Adherence Rate [ Time Frame: 12 weeks ]The percentage of patients with an improvement of at least one point in adherence score as measured by the Adherence Self-Report Questionnaire at the end of 12 weeks Scale Range: 1 to 6, with 1 being the highest (most adherent) and 6 being the lowest (least adherent)
- Percentage of Patients With Controlled Blood Pressure at the End of 12 Weeks [ Time Frame: 12 weeks ]The percentage of patients with systolic blood pressure less than 140 mmHg and diastolic blood pressure less than 90 mmHg at the end of 12 weeks
|Study Start Date:||January 2011|
|Study Completion Date:||July 2012|
|Primary Completion Date:||March 2012 (Final data collection date for primary outcome measure)|
Experimental: SMS text reminders
Participants in this arm will receive SMS text messages on top of the usual care they receive from their physicians.
Other: SMS text reminders
Patients in the intervention arm will receive 2 text messages per week delivered via SMS on randomly chosen days and times during the 12-week study period. The aims of the messages are to remind patients to take their blood pressure medications daily, what the target blood pressure is, and the benefits of daily intake of anti-hypertensive medications.
No Intervention: Usual Care
Participants in this arm will receive the usual care they receive from their physicians.
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Please refer to this study by its ClinicalTrials.gov identifier: NCT01255436
|Philippine General Hospital|
|Manila, Philippines, 1000|
|Principal Investigator:||Lia M. Palileo, MD||University of the Philippines Manila|