The goal of Nourish is to help adults with high blood pressure enjoy an eating pattern called DASH (Dietary Approaches to Stop Hypertension) to lower blood pressure and improve health. Nourish will use a mobile app and information about DASH to help study participants follow the DASH dietary plan by tracking what they eat and drink every day. The primary outcome of the study is 6-month change in following the DASH eating plan, as measured by 24-hour dietary recalls. The secondary outcome is change in blood pressure. Study participation will last one year.
Over 100 million Americans suffer from high blood pressure and are at increased risk for cardiovascular disease. Evidence supports the DASH (Dietary Approaches to Stop Hypertension) dietary pattern to reduce blood pressure. DASH is rich in fruits and vegetables, legumes, lean protein, and low-fat dairy, and reduced in red meats, sweets and processed foods. The Nourish trial will look at the effect of the intervention on changes in dietary quality and blood pressure among men and women with high blood pressure. Participants who join Nourish will be asked to track what they eat and drink every day through a smartphone app and to participate in online study visits. Some participants will also receive additional support from a registered dietitian. We are doing this study to understand how technology can help adults with high blood pressure follow a heart-healthy eating plan to improve their blood pressure.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
SUPPORTIVE_CARE
Masking
NONE
Enrollment
301
Participants will track their nutrition intake every day for six months using a study app and receive tailored feedback via text message based on their nutritional intake and adherence to the DASH dietary pattern. If necessary, they will receive responsive coaching from a Nourish registered dietitian in order to increase adherence to the DASH dietary pattern and their engagement with the intervention.
Duke University Medical Center
Durham, North Carolina, United States
Change in Dietary Intake as Measured by Dietary Approaches to Stop Hypertension (DASH) Score
Participants entered their dietary intake online via the National Cancer Institute's Automated Self-Administered 24-hour (ASA24) Dietary Assessment tool to record 2 separate 24-hour dietary recalls (1 weekday and 1 weekend day). DASH dietary nutrients are then converted into a score using the method described in Mellen et al (2008). Scores ranged from 0 to 9 where a higher score indicates better adherence to the DASH dietary pattern. Change in DASH score = 6-month DASH score - Baseline DASH score.
Time frame: Baseline and 6 months
Change in Systolic Blood Pressure
Systolic blood pressure measured in millimeters of mercury (mmHg) using the upper arm three times at 1-minute intervals after 5 minutes of quiet sitting. Blood pressure was measured 3 times at 1 minute intervals. The final 2 measurements were averaged together for analysis. Change in systolic blood pressure = 6-month systolic blood pressure - Baseline systolic blood pressure.
Time frame: Baseline and 6 months
Change in Diastolic Blood Pressure
Diastolic blood pressure measured in millimeters of mercury (mmHg) using the upper arm three times at 1-minute intervals after 5 minutes of quiet sitting. Blood pressure was measured 3 times at 1 minute intervals. The final 2 measurements were averaged together for analysis. Change in diastolic blood pressure = 6-month diastolic blood pressure - Baseline diastolic blood pressure.
Time frame: Baseline and 6 months
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