Primary prevention of hypertension--a randomized controlled trial

Area of Science:

• Cardiovascular Health
• Preventive Medicine
• Nutritional Science

Background:

• Hypertension is a significant public health concern.
• Primary prevention strategies are crucial for managing blood pressure.
• Nutritional and lifestyle interventions show promise in hypertension control.

Purpose of the Study:

• To evaluate the efficacy of a nutritional-hygienic intervention for the primary prevention of hypertension.
• To assess the impact of weight loss, reduced sodium intake, limited alcohol consumption, and physical activity on blood pressure.
• To compare the incidence of requiring antihypertensive medication between intervention and control groups.

Main Methods:

• A randomized controlled trial involving 201 participants with elevated diastolic blood pressure (80-89 mm Hg) and risk factors.
• Participants were assigned to either a monitored control group or an intervention group.
• The intervention included individualized guidance on weight loss (≥10 lbs), sodium reduction (to 75 mmol), alcohol limitation (≤2 drinks/day), and regular physical activity.

Main Results:

• The intervention group achieved a mean weight loss of 5.2 lbs, reduced sodium intake by 44% of goal, and increased physical activity.
• Diastolic blood pressure was slightly lower in the intervention group, with a significant 4.0 mm Hg additional reduction in those meeting key targets.
• Fewer participants in the intervention group required antihypertensive medication at two (0 vs. 5) and three (3 vs. 11) years compared to the control group.

Conclusions:

• A comprehensive nutritional-hygienic intervention is effective in the primary prevention of hypertension.
• Lifestyle modifications, including weight loss and dietary changes, significantly contribute to blood pressure management.
• This intervention strategy reduces the need for antihypertensive medication, highlighting its clinical and public health importance.