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. 2017 Apr 9;2017(4):CD004022. doi: 10.1002/14651858.CD004022.pub4

for the main comparison.

Low sodium intake compared with high sodium intake for blood pressure
Patient or population: White population with normal or elevated blood pressure, but otherwise healthy
Settings: Hospitals units in Europe and North America
Intervention: Low sodium intake
Comparison: High sodium intake
Outcomes Relative effect
 (95% CI) No of Participants
 (studies) Quality of the evidence
 (GRADE) Comments
White population, normotensive, SBP
mmHg
‐1.09 (‐1.63 to ‐0.56) 8569
 (89) ⊕⊕⊕⊕
 high  
White population, normotensive, DBP
mmHg
0.03 (‐0.37 to 0.43) 8833
 (90) ⊕⊕⊕⊕
 high  
White population, hypertensive, SBP
mmHg
‐5.51 (‐6.45 to ‐4.57) 5925
 (84) ⊕⊕⊕⊕
 high  
White population, hypertensive, DBP
mmHg
‐2.88 (‐3.44 to ‐2.32) 6001
 (85) ⊕⊕⊕⊕
 high  
GRADE Working Group grades of evidence
 High quality: Further research is very unlikely to change our confidence in the estimate of effect.
 Moderate quality: Further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate.
 Low quality: Further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate.
 Very low quality: We are very uncertain about the estimate.
DBP: diastolic blood pressure; SBP: systolic blood pressure