Diabetes prevalence has risen rapidly and has become a global health challenge. The Diabetes Prevention Program (DPP) has been shown to prevent or delay the development of diabetes among individuals with prediabetes. Yet, diabetes prevention studies within the Medicaid population are limited and results are mixed. This study aimed to evaluate the impact of different financial incentive strategies on the utilization of the DPP for Medicaid managed care adults in New York State. A four-arm randomized controlled trial was conducted among Medicaid managed care adult enrollees diagnosed with prediabetes and/or obesity. Study participants were offered a 16-week DPP with various incentive strategies based on class attendance and weight loss as follows: Attendance-Only, Weight-Loss Only, and both Attendance and Weight-Loss. A control group was offered DPP with no incentives for attendance or weight loss. We evaluated the impact of incentives on achievement of the program completion and weight-loss milestone. Participants who received incentives for the Attendance-Only class were least likely to be lost to follow-up, more likely to complete the program, and had two times higher percentage of meeting the weight-loss milestone compared to the control group. Results for the other incentive cohorts were mixed. A strong positive association was observed for participants who attended 9 or more classes and weight-loss regardless of incentive strategies. Providing monetary incentives for DPP class attendance had a positive impact on program completion and achieving the weight-loss milestone. However, the results from this study indicate that participant enrollment and retention remained challenges despite the incentives.
Trial registration: ClinicalTrials.gov NCT03139019.
Keywords: Diabetes; Diabetes prevention; Financial incentive; Medicaid; Randomized controlled trial.
Published by Elsevier Inc.