Key result
Higher baseline urinary sodium is associated with smaller SBP increases after acute oral saline loading.
Why the study?
Acute dietary salt intake may elevate blood pressure, but the acute effect of saline loading on blood pressure across different salt intake levels required assessment.
Does acute oral saline loading affect blood pressure differently based on baseline salt intake?
Population
2019 participants in the systemic epidemiology of salt sensitivity study baseline survey
Comparison
Acute oral saline loading test (1 L) evaluated across different levels of 24-hour urinary sodium excretion
Design
Observational baseline survey cross-sectional analysis
Authors
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Greater SBP rise after saline loading at lower baseline salt intake; hypothesis-generating for salt intake modifying BP reactivity, needs prospective confirmation.
Observational (n=2,019)
Does acute oral saline loading affect blood pressure differently based on baseline salt intake?
Effect estimate: β -0.901 (95% CI -1.253, -0.548)
Acute salt loading leads to an increase in systolic blood pressure, which is more pronounced in individuals with lower baseline salt intake.
Peng et al. (2020) conducted an observational in Different levels of salt intake (n=2,019). Acute oral saline loading test was evaluated on Association between 24-hour urinary sodium (24hUNa) and systolic blood pressure changes (β -0.901, 95% CI -1.253, -0.548). Acute oral saline loading increased systolic blood pressure, with the SBP increment negatively associated with baseline 24-hour urinary sodium (β = -0.901; 95% CI: -1.253, -0.548).
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