The Use of SMS Text Messaging to Improve the Hospital-to-Community Transition in Patients With Acute Coronary Syndrome (Txt2Prevent): Results From a Pilot Randomized Controlled Trial

Emily S Ross, Brodie M Sakakibara, Martha H Mackay, David G T Whitehurst, Joel Singer, Mustafa Toma, Kitty K Corbett, Harriette G C Van Spall, Kimberly Rutherford, Bobby Gheorghiu, Jillianne Code, Scott A Lear, Emily S Ross, Brodie M Sakakibara, Martha H Mackay, David G T Whitehurst, Joel Singer, Mustafa Toma, Kitty K Corbett, Harriette G C Van Spall, Kimberly Rutherford, Bobby Gheorghiu, Jillianne Code, Scott A Lear

Abstract

Background: Acute coronary syndrome (ACS) is a leading cause of hospital admission in North America. Many patients with ACS experience challenges after discharge that impact their clinical outcomes and psychosocial well-being. SMS text messaging has the potential to provide support to patients during this postdischarge period.

Objective: This study pilot tested a 60-day SMS text messaging intervention (Txt2Prevent) for patients with ACS. The primary objective was to compare self-management domains between usual care and usual care plus Txt2Prevent. The secondary objectives were to compare medication adherence, health-related quality of life, self-efficacy, and health care resource use between groups. The third objective was to assess the feasibility of the study protocol and the acceptability of the intervention.

Methods: This was a randomized controlled trial with blinding of outcome assessors. We recruited 76 patients with ACS from St. Paul's Hospital in Vancouver, Canada, and randomized them to 1 of 2 groups within 7 days of discharge. The Txt2Prevent program included automated 1-way SMS text messages about follow-up care, self-management, and healthy living. Data were collected during the index admission and at 60 days after randomization. The primary outcome was measured with the Health Education Impact Questionnaire (heiQ). Other outcomes included the EQ-5D-5L, EQ-5D-5L Visual Analog Scale, a modified Sullivan Cardiac Self-Efficacy Scale, and Morisky Medication Adherence Scale scores, and self-reported health care resource use. Analyses of covariance were used to test the effect of group assignment on follow-up scores (controlling for baseline) and were considered exploratory in nature. Feasibility was assessed with descriptive characteristics of the study protocol. Acceptability was assessed with 2 survey questions and semistructured interviews.

Results: There were no statistically significant differences between the groups for the heiQ domains (adjusted mean difference [Txt2Prevent minus usual care] for each domain-Health-directed activity: -0.13, 95% CI -0.39 to 0.13, P=.31; Positive and active engagement in life: 0.03, 95% CI -0.19 to 0.25, P=.76; Emotional distress: 0.04, 95% CI -0.22 to 0.29, P=.77; Self-monitoring and insight: -0.14, 95% CI -0.33 to 0.05, P=.15; Constructive attitudes and approaches: -0.10, 95% CI -0.36 to 0.17, P=.47; Skill technique and acquisition: 0.05, 95% CI -0.18 to 0.27, P=.69; Social integration and support: -0.12, 95% CI -0.34 to 0.10, P=.27; and Health services navigation: -0.05, 95% CI -0.29 to 0.19, P=.69). For the secondary outcomes, there were no statistically significant differences in adjusted analyses except in 1 self-efficacy domain (Total plus), where the Txt2Prevent group had lower scores (mean difference -0.36, 95% CI -0.66 to -0.50, P=.03). The study protocol was feasible, but recruitment took longer than expected. Over 90% (29/31 [94%]) of participants reported they were satisfied with the program.

Conclusions: The Txt2Prevent study was feasible to implement; however, although exploratory, there were no differences between the 2 groups in adjusted analyses except for 1 self-efficacy domain. As the intervention appeared acceptable, there is potential in using SMS text messages in this context. The design of the intervention may need to be reconsidered to have more impact on outcome measures.

Trial registration: ClinicalTrials.gov NCT02336919; https://ichgcp.net/clinical-trials-registry/NCT02336919.

International registered report identifier (irrid): RR2-10.2196/resprot.6968.

Keywords: SMS text messaging; acute coronary syndrome; cardiovascular disease; mHealth.

Conflict of interest statement

Conflicts of Interest: None declared.

©Emily S Ross, Brodie M Sakakibara, Martha H Mackay, David G T Whitehurst, Joel Singer, Mustafa Toma, Kitty K Corbett, Harriette G C Van Spall, Kimberly Rutherford, Bobby Gheorghiu, Jillianne Code, Scott A Lear. Originally published in JMIR mHealth and uHealth (https://mhealth.jmir.org), 14.05.2021.

Figures

Figure 1
Figure 1
CONSORT flow diagram.

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