Urinary Sodium Excretion and Salt Intake Are Not Associated With Blood Pressure Variability in a White General...

Area of Science:

• Cardiovascular Research
• Nutritional Science
• Hypertension Studies

Background:

• Previous research on salt restriction and blood pressure variability (BPV) yielded inconsistent findings.
• Investigating the relationship between sodium excretion and 24-hour BPV is crucial for understanding hypertension management.
• The Maastricht Study and a randomized crossover trial were utilized to address this knowledge gap.

Purpose of the Study:

• To determine if 24-hour urinary sodium excretion is associated with 24-hour blood pressure variability (BPV).
• To assess the impact of low- and high-salt diets on 24-hour BPV in a controlled intervention.
• To evaluate the independent association of salt intake with BPV in a general population.

Main Methods:

• An observational study using data from the Maastricht Study (n=2652) and a randomized crossover trial (n=40).
• 24-hour urinary sodium excretion and 24-hour BPV were measured.
• Linear regression and linear mixed models were employed for data analysis, adjusting for relevant covariates.

Main Results:

• The observational study found no significant association between 24-hour urinary sodium excretion and 24-hour systolic or diastolic BPV.
• The intervention trial showed no statistically significant difference in 24-hour BPV between low- and high-salt diets.
• Adjusted regression analyses did not reveal an independent link between sodium excretion and BPV.

Conclusions:

• Urinary sodium excretion and salt intake are not independently associated with 24-hour blood pressure variability.
• Salt restriction does not appear to be an effective strategy for reducing BPV in the general white population.
• Further research may be needed to explore other factors influencing BPV.