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.

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-value3 (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-value9 (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


Mean (SD).

1 Indicates the significance of difference between the groups analyzed with the Mann-Whitney test with Bonferroni corrections.

2 Indicates the significance of difference within the group analyzed with the Wilcoxon test with Bonferroni corrections.

3 Indicates the significance of difference between the groups analyzed with the independent samples t-test.

4 Indicates the significance of the time*group interaction analyzed with the GLM for repeated measures.

5 Indicates the significance of difference between the groups analyzed with the independent samples t-test with Bonferroni corrections.

6 Indicates the significance of difference within the group analyzed with the paired samples t-test with Bonferroni corrections.

7 Indicates the significance of difference between the groups analyzed with the Mann-Whitney test.

8 Indicates the significance of difference between the groups analyzed with the GLM for repeated measures.

9 Indicates the significance of difference within the groups analyzed with the GLM for repeated measures.

P-values < 0.05 are considered as significant.

NS = non-significant

Sarkkinen et al. Nutrition Journal 2011 10:88   doi:10.1186/1475-2891-10-88

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