JMIR Publications

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. Text messaging has the potential to provide support to patients during this post-discharge period.

Objective:

This study pilot-tested a 60-day 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 healthcare 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 one of two groups within seven days of discharge. The Txt2Prevent program included automated one-way text messages about follow-up care, self-management and healthy living. Data was 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 visual analogue scale, Sullivan Cardiac Self-Efficacy Scale, Morisky Medication Adherence Scale and self-reported healthcare 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 two survey questions and semi-structured interviews.

Results:

There were no statistically significant differences between the groups for the heiQ domains (adjusted mean difference: health directed activity: –0.13 [95% confidence interval (CI): –0.39-0.13]; positive and active engagement in life: 0.03 [95% CI: –0.19-0.25]; emotional distress: 0.04 [95% CI: –0.22-0.29]; self-monitoring and insight: 0.14 [95% CI: –0.33-0.05]; constructive attitudes and approaches: –0.10 [95% CI: –0.36- 0.17]; skill technique and acquisition: 0.05 [95% CI: –0.18-0.27]; social integration and support: –0.12 [95% CI: –0.34-0.19]; health services navigation: –0.05 [95% CI: –0.29-0.19]). For the secondary outcomes, there were no statistically significant differences in adjusted analyses except in one self-efficacy domain (‘Total Plus’), where the Txt2Prevent group had lower scores (mean difference: –0.36 [95% CI: –0.66 to -0.50]). The study protocol was feasible although recruitment took longer than expected. Over 90% 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 two groups in adjusted analyses except for one self-efficacy domain. As the intervention appeared acceptable, there is potential in using text messages in this context. The design of the intervention may need to be reconsidered to have more impact on outcome measures. Clinical Trial: ClinicalTrials.gov NCT02336919