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Table 3 Systolic and diastolic blood pressure during the intervention period.

From: Feasibility and antihypertensive effect of replacing regular salt with mineral salt -rich in magnesium and potassium- in subjects with mildly elevated blood pressure

  Smart Salt®
(n = 22)
Regular salt (n = 23) p-value p-value
Systolic blood pressure (mmHg)    p < 0.0011
Visit 3 (0 week) 140 (13) 134 (9) NS3  
Visit 4 (+3 weeks) 133 (8)a 140 (9) p = 0.0283  
Visit 5 (+6 weeks) 132 (10)b 139 (10) NS3  
Visit 6 (+8 weeks) 132 (7)c 138 (9) NS (p = 0.076)3  
p-value 1 (p < 0.001)     
p-value 2 p = 0.016 NS (p = 0.072)   
Diastolic blood pressure (mmHg)    p = 0.0071
Visit 3 (0 week) 89 (8) 88 (7) NS3  
Visit 4 (+3 weeks) 86 (6) 90 (6) NS3  
Visit 5 (+6 weeks) 86 (6) 91 (8) NS3  
Visit 6 (+8 weeks) 86 (7) 90 (7) NS3  
p-value 1 (p = 0.007)     
p-value 2 NS (p = 0.094) NS   
  1. 1 Indicates the significance of the time*group interaction analyzed with the GLM for repeated measures.
  2. 2 Indicates the significance of difference within the groups analyzed with the GLM for repeated measures with Bonferroni corrections.
  3. 3 Indicates the significance of difference between the groups analyzed with the independent samples t-test with Bonferroni corrections.
  4. Letters indicate significance of within-group difference compared to baseline (0 wk) analyzed with paired t-test with Bonferroni corrections.
  5. a p = 0.081
  6. b p = 0.024
  7. c p = 0.006
  8. P-values < 0.05 are considered as statistically significant.
  9. NS = non-significant