A Virtual Cardiometabolic Health Program Among African Immigrants in the US: A Pilot Cluster-Randomized Clinical Trial.

Abstract

Importance: Black persons, including immigrants, in the US disparately experience poor cardiometabolic health (CMH). Limited research on the effect of lifestyle interventions that improve CMH among African immigrant populations is available.

Objective: To test the effectiveness of a culturally adapted, virtual lifestyle intervention on control of blood pressure (BP) and hemoglobin A1c (HbA1c) levels among African immigrants with CMH risk factors.

Design, setting, and participants: Afro-DPP (Diabetes Prevention Program), a pilot cluster-randomized clinical trial, evaluated the effectiveness of a multicomponent CMH intervention. The study took place in 2 churches with predominantly African immigrant congregations in the Baltimore-Washington, DC, metropolitan area from January 1, 2022, to July 31, 2023. Participants were adults aged 25 to 75 years with at least 2 CMH risk factors who self-identified as African immigrants and belonged to the participating churches. Analyses followed the intention-to-treat principle.

Intervention: Participants received a 6-month culturally adapted lifestyle intervention based on the National DPP curriculum, delivered via virtual group sessions by a lifestyle coach of African origin. The delayed intervention began 6 months later with a follow-up time of 6 months. The intervention also included remote BP and weight monitoring.

Main outcome and measures: Primary outcomes were changes in systolic and diastolic BP and HbA1c levels from baseline to 6 months. Secondary outcomes included reduced body weight and body mass index (BMI; calculated as weight in kilograms divided by height in meters squared).

Results: The analytic population included 60 participants (mean [SD] age, 50.6 [11.9] years; 40 [66.7%] women). In the first intervention group (n = 30), systolic BP decreased by 9.2 (95% CI, 2.5-15.9) mm Hg, diastolic BP by 6.1 (95% CI, 2.1-10.0) mm Hg, body weight by 4.9 (95% CI, 1.0-8.7) kg, and BMI by 1.1 (95% CI, 0.4-1.7) at 6 months. In the delayed intervention group (n = 30), systolic BP decreased by 11.4 (95% CI, 2.4-20.5) mm Hg, diastolic BP by 10.3 (95% CI, 5.4-15.2) mm Hg, and body weight by 3.3 (95% CI, 0.01-6.5) kg, while BMI increased by 0.3 (95% CI, -1.5 to 2.0).

Conclusions and relevance: Trial findings indicate that interventions incorporating cultural adaptation and virtual components could help address CMH disparities in this population.

Trial registration: ClincalTrials.gov Identifier NCT05144737.