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 A1c (HbA1c) was the primary outcome measure, and a 2-tailed, paired t test was used to evaluate changes in HbA1c 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 HbA1c 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 HbA1c 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.

BACKGROUND A number of barriers exist to diabetes treatment and care, particularly in underserved medical communities. OBJECTIVE To address these barriers, this study aimed to evaluate a novel, culturally-adapted, Spanish-language mHealth diabetes program on glycemic control (HbA1c). METHODS The Spanish-language Vida Health Diabetes Management Program was utilized among 182 (females = 119) Spanish-speaking adults with diabetes. This app-based Program provided access to culturally-adapted educational content on diabetes self-management, one-to-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. RESULTS We observed a significant decrease in HbA1c of -1.23 points between baseline (mean: 9.65, SD: 1.56) and follow-up (mean: 8.42, SD: 1.44; p<0.001). Additionally, we observed a greater decrease in HbA1c among participants with high program engagement (change high: -1.59, SD: 1.97; change low: -0.84, SD: 1.64, p<0.001). CONCLUSIONS This work highlights that the Vida Health Diabetes Management application can be culturally adapted to serve Spanish-speaking populations, and that it can be effective in improving glycemic control.