A Church-Based Weight Loss Intervention in African American Adults using Text Messages (LEAN Study): Cluster Randomized Controlled Trial

Robert L Newton Jr, Leah A Carter, William Johnson, Dachuan Zhang, Sandra Larrivee, Betty M Kennedy, Melissa Harris, Daniel S Hsia, Robert L Newton Jr, Leah A Carter, William Johnson, Dachuan Zhang, Sandra Larrivee, Betty M Kennedy, Melissa Harris, Daniel S Hsia

Abstract

Background: African American adults experience a high prevalence of obesity and its associated comorbidities, including diabetes. Church-based interventions have been shown to be effective in decreasing weight in this population. mHealth interventions can address two needs for obesity treatment in this community, including enhancing weight loss and providing wide dissemination.

Objective: This study aimed to assess the feasibility and efficacy of a church-based weight loss intervention that incorporates mHealth technology.

Methods: In this study, 8 churches (n=97) were randomly assigned to the intervention or delayed intervention condition (control group). We recruited participants through their respective church. Volunteer church members were trained by study staff to deliver the 10-session, 6-month intervention. Participants in the intervention group attended group sessions and received automated short message service (SMS) text messages designed to reinforce behavioral strategies. Conversely, participants in the delayed intervention condition received SMS text messages related to health conditions relevant for African American adults. We obtained measures of body composition, blood pressure, blood glucose, and cholesterol.

Results: We successfully recruited 97 African American adults, with a mean age of 56.0 (SE 10.3) years and a mean body mass index of 38.6 (SE 6.4) kg/m2 (89/97, 91.8% females), who attended the churches that were randomized to the intervention (n=68) or control (n=29) condition. Of these, 74.2% (72/97) of the participants (47/68, 69.1% intervention; 25/29, 86.2% delayed intervention) completed the 6-month assessment. The average intervention group attendance was 55%. There was a significant difference in weight loss (P=.04) between participants in the intervention (-1.5 (SE 0.5) kg) and control (0.11 (SE 0.6) kg) groups. Among participants in the intervention group, the correlation between the number of SMS text messages sent and the percent body fat loss was r=.3 with P=.04. The participants reported high satisfaction with the automated SMS text messages.

Conclusions: Automated SMS text messages were well-received by participants, suggesting that more enhanced mHealth technologies are a viable option for interventions targeting African American adults.

Trial registration: ClinicalTrials.gov NCT02863887; https://ichgcp.net/clinical-trials-registry/NCT02863887 (Archived by WebCite at http://www.webcitation.org/71JiYzizO).

Keywords: African Americans; behavioral strategies; community health; mHealth; mobile phone; obesity; text messages; weight loss.

Conflict of interest statement

Conflicts of Interest: None declared.

©Robert L Newton Jr, Leah A Carter, William Johnson, Dachuan Zhang, Sandra Larrivee, Betty M Kennedy, Melissa Harris, Daniel S Hsia. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 24.08.2018.

Figures

Figure 1
Figure 1
Study flowchart.

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