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Sponsored by: |
National Heart, Lung, and Blood Institute (NHLBI) |
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Information provided by: | National Heart, Lung, and Blood Institute (NHLBI) |
ClinicalTrials.gov Identifier: | NCT00000521 |
To examine the effects of nutritional intervention on the rate of rise of blood pressure in late childhood and early adolescence.
Condition | Intervention | Phase |
---|---|---|
Cardiovascular Diseases Heart Diseases Hypertension Vascular Diseases |
Behavioral: diet, sodium-restricted Behavioral: diet, potassium-supplemented |
Phase III |
Study Type: | Interventional |
Study Design: | Prevention, Randomized |
Study Start Date: | August 1985 |
BACKGROUND:
Since 1970, children and adolescents with hypertension have been detected with increasing frequency. Many of them were thought to have primary or essential hypertension and it remained unclear how they should be managed. Additionally, since tracking of blood pressure occurred even in early life, it was believed that youngsters with blood pressures persistently in the upper deciles for age were at increased risk for later hypertension. No clinical trials had been performed in this age group to examine the effects of non-pharmacologic or drug therapy in lowering blood pressure. The trial was one of the first attempts to examine the effects of a nutritional intervention on the rate of rise of blood pressure in late childhood and early adolescence.
DESIGN NARRATIVE:
Randomized, partial-blind. After 19,542 fifth to eighth grade students were screened, 210 (105 boys and 105 girls) from the upper 15 percentiles of blood pressure distribution were randomly assigned to one of three groups: low sodium diet (70 mmol sodium intake per day), potassium chloride supplementation (normal diet plus 1 mmol/kg potassium chloride per day), and placebo (normal diet plus placebo capsule). Capsules for the potassium chloride and placebo groups were administered in a double blind protocol. Blood pressure was measured every three months for three years. The effect of the intervention was determined by comparing the rate of rise (slope) of blood pressure among the groups using a random-coefficient growth curve model.
Ages Eligible for Study: | 10 Years to 13 Years |
Genders Eligible for Study: | Both |
Accepts Healthy Volunteers: | No |
Children in grades 5 through 8 whose systolic blood pressure was greater than or equal to 120 mm Hg on two visits.
Study ID Numbers: | 40 |
Study First Received: | October 27, 1999 |
Last Updated: | June 23, 2005 |
ClinicalTrials.gov Identifier: | NCT00000521 |
Health Authority: | United States: Federal Government |
Heart Diseases Vascular Diseases Hypertension |
Cardiovascular Diseases |