Changes in Glycemic Control Following Use of a Spanish-Language, Culturally Adapted Diabetes Program: Retrospective Study

Background: Several barriers to diabetes treatment and care exist, particularly in underserved medical communities. Objective: This study aimed to evaluate a novel, culturally adapted, Spanish-language mHealth diabetes program for glycemic control. Methods: Professional Spanish translators, linguists, and providers localized the entirety of the Vida Health Diabetes Management Program into a culturally relevant Spanish-language version. The Spanish-language Vida Health Diabetes Management Program was used by 182 (n=119 women) Spanish-speaking adults with diabetes. This app-based program provided access to culturally adapted educational content on diabetes self-management, one-on-one remote counseling and coaching sessions, and on-demand in-app messaging with bilingual (Spanish and English) certified health coaches, registered dietitian nutritionists, and certified diabetes care and education specialists. Hemoglobin A(1c) (HbA(1c)) was the primary outcome measure, and a 2-tailed, paired t test was used to evaluate changes in HbA(1c) before and after program use. To determine the relationship between program engagement and changes in glycemic control, a cluster-robust multiple regression analysis was employed. Results: We observed a significant decrease in HbA(1c) of -1.23 points between baseline (mean 9.65%, SD 1.56%) and follow-up (mean 8.42%, SD 1.44%; P<.001). Additionally, we observed a greater decrease in HbA(1c) among participants with high program engagement (high engagement: -1.59%, SD 1.97%; low engagement: -0.84%, SD 1.64%; P<.001). Conclusions: This work highlights improvements in glycemic control that were clinically as well as statistically significant among Spanish-preferring adults enrolled in the Vida Health Spanish Diabetes Management Program. Greater improvements in glycemic control were observed among participants with higher program engagement. These results provide needed support for the use of digital health interventions to promote meaningful improvements in glycemic control in a medically underserved community.