Dietary salt restriction v control for normal or high blood pressure*

OutcomesNumber of RCTsWeighted mean difference (95% CI)
Systolic BP (mm Hg) at 6–12 months7−2.5 (−3.8 to −1.2)
Diastolic BP (mm Hg) at 6–12 months7−1.2 (−1.8 to −0.7)
Systolic BP (mm Hg) at 13–60 months4−1.1 (−1.8 to −0.4)
Diastolic BP (mm Hg) at 13–60 months4−0.6 (−1.5 to 0.3)†
Weighted event ratesRRR (95% CI)NNT
Total mortality30.69%0.73%10% (−124 to 36)Not significant
Cardiovascular morbidity211%14%18% (−21 to 41)Not significant
*BP = blood pressure; RCTs = randomised controlled trials. Other abbreviations defined in glossary; weighted event rates, RRR, RRI, NNT, NNH, and CI calculated from data in article.
†Not significant.
Dropouts912%11%4% (−14 to 25)Not significant