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Table 4 Total urinary sodium (du-Na), potassium (dU-K), magnesium (dU-Mg) and creatinine (dU-Crea) excretion in 24-h period before (-1 day) and during (+8 wk) the intervention.

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
dU- Na (mmol)     
Visit 3 (-1 day) 130 (47) 151 (44) NS1  
Visit 6 (+8 weeks) 100 (49) 150 (46) p < 0.0021  
p-value p = 0.0122 NS2   
Change: 0 wk vs +8 wk -29.8 (53.3) -0.9 (42.0) NS (p = 0.050)3  
dU-K (mmol)     p = 0.0034
Visit 3 (-1 day) 79 (31) 82 (22) NS5  
Visit 6 (+8 weeks) 95 (32) 66 (22) p = 0.0025  
p-value 3 (p = 0.003)     
p-value NS6 p = 0.0346   
Change: 0 wk vs +8 wk 16.0 (37.4) -15.7 (29.0) p < 0.0017  
dU-Mg (mmol)    NS8 NS4
Visit 3 (-1 day) 4.54 (1.61) 4.67 (1.24)   
Visit 6 (+8 weeks) 5.14 (1.97) 4.46 (1.67)   
p-value 9 (NS)     
Change: 0 wk vs +8 wk 0.60 (1.82) -0.21 (1.31) p = 0.0287  
dU-Crea (mmol)     
Visit 3 (-1 day) 12 (4) 14 (4) NS1  
Visit 6 (+8 weeks) 11 (4) 12 (4) NS1  
p-value NS2 p = 0.0302   
dU-Na/dUCrea     
Visit 3 (-1 day) 11.5 (4.1) 11.9 (3.8) NS1  
Visit 6 (+8 weeks) 11.7 (12.7) 12.7 (4.0) p = 0.0041  
p-value NS2 NS2   
  1. Mean (SD).
  2. 1 Indicates the significance of difference between the groups analyzed with the Mann-Whitney test with Bonferroni corrections.
  3. 2 Indicates the significance of difference within the group analyzed with the Wilcoxon test with Bonferroni corrections.
  4. 3 Indicates the significance of difference between the groups analyzed with the independent samples t-test.
  5. 4 Indicates the significance of the time*group interaction analyzed with the GLM for repeated measures.
  6. 5 Indicates the significance of difference between the groups analyzed with the independent samples t-test with Bonferroni corrections.
  7. 6 Indicates the significance of difference within the group analyzed with the paired samples t-test with Bonferroni corrections.
  8. 7 Indicates the significance of difference between the groups analyzed with the Mann-Whitney test.
  9. 8 Indicates the significance of difference between the groups analyzed with the GLM for repeated measures.
  10. 9 Indicates the significance of difference within the groups analyzed with the GLM for repeated measures.
  11. P-values < 0.05 are considered as significant.
  12. NS = non-significant