Hypertension Clinical Trial
Official title:
Diet Intervention for Hypertension: Adaptation and Dissemination to Native Communities
We will conduct a randomized trial to test our DASH (Dietary Approaches to Stop Hypertension) based intervention in 370 adult American Indians with inadequately controlled systolic blood pressure (≥130 mmHg). Over the 5 years of the project, we will recruit and randomize 200 participants from each of 4 urban sites: two in Washington, one in Oklahoma, and one in South Dakota.
All participants complete 3 data collection visits following an over-the-phone eligibility screening call (baseline, week 8, and week 12). Participants will be randomized into either the control group or the intervention group at the baseline visit. All participants will receive 8 weekly credits for groceries and will be given equipment for monitoring their BP at home. Study staff will help participants place their grocery orders each week, and will collect readings from the home BP monitoring equipment at the same time. This data will be used to understand whether the intervention is effective for controlling BP. All participants will be encouraged to maintain their regular levels of physical activity and receive treatment as usual from their healthcare providers. The control group participants will receive an American Heart Association printed brochure about the health benefits of a low-salt diet. All foods will be available to purchase, including those that do not meet the DASH diet guidelines. The intervention group participants will receive 1 hour of nutritional counseling over the phone and a personalized prescription for the low-salt DASH diet based on estimated calorie needs at baseline, followed by weekly 20-minute phone calls in weeks 1-8 to provide extra support. The intervention group's food choices will be limited to fresh produce and a pre-determined list of other foods included in the DASH diet. During weekly phone calls, the dietitian will use a structured phone curriculum to discuss in more detail a different component of the DASH diet, followed by goal setting related to that component. Through small goal setting each week, participants will receive ongoing support to improve full adherence to the DASH diet by the end of week 8. ;
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