A Nutrition Intervention to Lower Blood Pressure in Adolescents

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00431288
Recruitment Status : Completed
First Posted : February 5, 2007
Last Update Posted : February 5, 2007
Information provided by:
University of Cincinnati

Brief Summary:
The purpose of this study is to evaluate the efficacy of a 12-week, clinic-based, behavioral nutrition intervention emphasizing fruits, vegetables, and low fat dairy compared to routine nutrition care on changing dietary knowledge, self-efficacy, diet quality and blood pressure post-treatment and at short-term follow-up in adolescents with hypertension.

Condition or disease Intervention/treatment Phase
Hypertension Behavioral: diet high in fruits, vegetables, and dairy Behavioral: Routine nutrition care Not Applicable

Detailed Description:
Among youth, hypertension is no longer a rare disease, affecting about 7 million children and adolescents. Numbers are increasing with the evolving pediatric obesity epidemic in the US. More adolescents than children have primary hypertension, which tracks into adulthood and has been linked with preclinical indicators of adverse cardiovascular events in adults. Early prevention and intervention efforts are needed to address this increasing public and individual health problem. The purpose of this project is to evaluate the immediate and sustained impact of a 3-month clinic-based behavioral nutrition intervention emphasizing a diet high in fruits, vegetables, and low fat dairy, and low in fat and sodium (the DASH intervention) versus routine nutrition care on changing dietary knowledge, self-efficacy, diet quality and blood pressure in adolescents with pre-hypertension or hypertension. The DASH intervention will include a printed participant manual, 1 individual counseling session with a dietitian, 4 mailings and 10 telephone calls on behavioral strategies to promote dietary change. Routine care will include 1 individual counseling session with a dietitian on dietary guidelines consistent with those of the National High Blood Pressure Education Program. Adolescents with prehypertension or hypertension will be randomly assigned to the DASH intervention or routine nutrition care after pre-treatment assessment. Post-treatment and at 3-month follow-up, outcome measures will be assessed including nutrition knowledge, self-efficacy, dietary intake, and blood pressure. Our expectations are that the DASH intervention will significantly improve dietary knowledge, self-efficacy, dietary quality and blood pressure in adolescents with elevated blood pressure compared to that observed as a result of routine nutrition care. The findings from this study are expected to improve the manner in which hypertension among adolescents is being treated in the clinical setting and contribute to the enhancement of the cardiovascular health of the target population.

Study Type : Interventional  (Clinical Trial)
Enrollment : 54 participants
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Single
Primary Purpose: Treatment
Official Title: Efficacy of a Nutrition Intervention Emphasizing Fruits, Vegetables and Dairy to Lower Blood Pressure in Adolescents
Study Start Date : August 2003
Study Completion Date : June 2006

Resource links provided by the National Library of Medicine

U.S. FDA Resources

Primary Outcome Measures :
  1. knowledge, self-efficacy, diet quality (food groups and nutrients), blood pressure

Secondary Outcome Measures :
  1. Body mass index (BMI) and BMI z score

Information from the National Library of Medicine

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Ages Eligible for Study:   11 Years to 18 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • clinical diagnosis of prehypertension or stage 1 hypertension
  • age 11-18 years
  • english speaking

Exclusion Criteria:

  • stage 2 or secondary hypertension
  • target organ damage or symptomatic hypertension
  • type 1 or 2 diabetes
  • treated with anti-hypertensive medications or other blood pressure altering medications
  • are unwilling to stop use of vitamins, minerals or antacids containing calcium or magnesium
  • do not have full medical clearance from a physician to participate

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00431288

United States, Ohio
Cincinnati Children's Hospital Medical Center
Cincinnati, Ohio, United States, 45229-3039
Sponsors and Collaborators
University of Cincinnati
Principal Investigator: Sarah C Couch, Ph.D. University of Cincinnati

Publications automatically indexed to this study by Identifier (NCT Number): Identifier: NCT00431288     History of Changes
Other Study ID Numbers: AHA 0355332B
First Posted: February 5, 2007    Key Record Dates
Last Update Posted: February 5, 2007
Last Verified: February 2007

Keywords provided by University of Cincinnati:
adolescent nutrition
blood pressure
diet therapy
patient education

Additional relevant MeSH terms:
Vascular Diseases
Cardiovascular Diseases