About this trial
This nested pilot Randomized Clinical Trial will determine whether the Diabetes Prevention Program (DPP) enhanced with evidence-based sleep health and time restricted eating interventions ("DPP++") is more effective than the DPP alone for improving metabolic and cardiovascular metrics in 40 overweight/obese adults with prediabetes.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Adults aged 18 years or older
Prediabetes confirmed by blood test result within 12 months of enrollment, previous diagnosis of gestational diabetes mellitus (GDM), or positive screening for prediabetes based on the Prediabetes Risk Test
BMI of 25 kg/m² or greater (23 kg/m² or greater for Asian Americans)
Disqualifiers
Age younger than 18 years
BMI less than 25 kg/m² (less than 23 kg/m² for Asian Americans)
No current diagnosis of prediabetes or gestational diabetes mellitus
Prior diagnosis of type 1 or type 2 diabetes
Trial design
Parallel
Treatments tested in this trial
National Diabetes Prevention Program (DPP)
BehavioralA 12-month, 26-session group-based lifestyle intervention delivered by trained lifestyle coaches focusing on healthy eating, physical activity, stress management, and behavior change strategies. The primary goal is to achieve 5-7% weight loss and 150 minutes of moderate-to-vigorous physical activity per week. Sessions are delivered weekly in months 1-4, bi-weekly in months 5-6, and monthly in months 7-12.
Sleep Health Digital Application
BehavioralA self-guided digital sleep health program delivering evidence-based behavioral strategies to improve sleep duration, timing, and quality. Participants have access to the application during months 5-12 of the study.
Time-Restricted Eating (TRE)
BehavioralA self-guided intervention targeting eating window. Participants receive educational materials and a brief orientation session at randomization to support implementation and adherence.
Treatment groups
Trial outcomes
Primary outcomes
Percent weight loss
Percent weight loss from baseline, calculated from body weight measured at baseline and the primary endpoint (month 6). Between-group differences in percent weight loss will be compared between the experimental DPP++ and control DPP arms.
Sponsors and contacts
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