What question did this study set out to answer?

To evaluate the effects of longer term modest salt reduction on blood pressure, hormones, and lipid concentrations.

April 3, 2013BMJOpen Access

Effect of longer term modest salt reduction on blood pressure: Cochrane systematic review and meta-analysis of randomised trials

View Full Paper

Ask AI

Bookmark

Why the study?

Does a modest reduction in salt intake for at least four weeks reduce blood pressure in hypertensive and normotensive individuals?

Key Points

To evaluate the effects of longer term modest salt reduction on blood pressure, hormones, and lipid concentrations.
Systematic review and random-effects meta-analysis of 34 randomized trials (N=3230) evaluating modest salt reduction for at least four weeks.
Conducted subgroup analyses and meta-regression to assess effects across baseline blood pressure status (hypertensive vs normotensive), age, sex, and ethnicity.
A mean 24-hour urinary sodium reduction of -75 mmol/24 h (-4.4 g/day salt) resulted in a mean change in systolic blood pressure of -4.18 mm Hg (95% CI -5.18 to -3.18) and diastolic blood pressure of -2.06 mm Hg (95% CI -2.67 to -1.45).
Reductions in systolic and diastolic blood pressure were -5.39 mm Hg (95% CI -6.62 to -4.15) and -2.82 mm Hg (95% CI -3.54 to -2.11) in hypertensive participants compared to -2.42 mm Hg (95% CI -3.56 to -1.29) and -1.00 mm Hg (95% CI -1.85 to -0.15) in normotensive participants.
Salt reduction produced modest increases in plasma renin activity (0.26 ng/mL/h, 95% CI 0.17 to 0.36) and aldosterone (73.20 pmol/L, 95% CI 44.92 to 101.48), with no significant changes in blood lipids.

Structured PICO

Does a modest reduction in salt intake for at least four weeks reduce blood pressure in hypertensive and normotensive individuals?

Population

3,230 participants across 34 randomised trials, including both hypertensive and normotensive individuals, men and women, and white and black people.

Intervention

Modest reduction in salt intake (mean reduction of 4.4 g/day salt or 75 mmol/24 h urinary sodium) for at least four weeks.

Comparator

Usual salt intake.

Outcome

Mean change in systolic and diastolic blood pressure.surrogate

A modest reduction in salt intake for four or more weeks significantly lowers blood pressure in both hypertensive and normotensive individuals, supporting population-wide salt reduction strategies to reduce cardiovascular disease.

Discussion

No takes yet. Share an insight, caveat, or question.

Implication

Supports modest salt reduction for BP control in hypertensives and normotensives; reinforces population-wide strategies to lower CVD risk.

Cite This Study

He et al. (2013) studied this question.

synapsesocial.com/papers/6a03c82394ec7ec37ca9d1d0 https://doi.org/10.1136/bmj.f1325

Topics

Hypertension management Women and heart disease

View Full Paper

Ask AI

Bookmark

Implication

Supports modest salt reduction for BP control in hypertensives and normotensives; reinforces population-wide strategies to lower CVD risk.

Effect of longer term modest salt reduction on blood pressure: Cochrane systematic review and meta-analysis of randomised trials

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Topics

Effect of longer term modest salt reduction on blood pressure: Cochrane systematic review and meta-analysis of randomised trials

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Also Consider

Topics

Also Consider