Table 3 Biochemical characteristics in serum and urine.

From: Comparison of serum calcium, magnesium, phosphate, alkaline phosphatase, and vitamin D levels in children consuming reverse osmosis, non reverse osmosis, and high fluoride drinking water

Variables

RO water

Non RO water

High fluoride water

p-value

Serum calcium (mmol/L)

9.19(0.46)

10.02(0.41)

9.81(0.40)

0.001

Ionic calcium (mg/dl)

1.19(0.02)

1.23(0.07)

1.25(0.05)

0.001

Magnesium (mg/dl)

2.29(0.33)

2.11(0.14)

2.38(0.33)

0.001

Vitamin D (ng/mL)

20.80(7.59)

21.28(8.80)

22.49(6.84)

0.482

Alkaline phosphatase (U/L)

254.19(34.27)

271.61(60.58)

188.81(27.44)

0.001

Phosphate (mg/dl)

3.40(0.45)

4.96(0.62)

3.78(0.47)

0.001

24 h urine calcium (mg)

76.27(27.18)

81.83(76.86)

76.19(40.53)

0.405

24 h urine creatinine (mg)

877.97(469.46)

606.76(318.73)

439.66(144.88)

0.001

24 h urine calcium and creatinine ratio

0.13(0.11)

0.15(0.17)

0.19(0.11)

0.001

24 h urine fluoride (ppm)

0.11(0.11)

0.35(0.18)

0.87(0.28)

0.001

  1. p value represents the comparison of biochemical characteristics of RO, non-RO and high fluoride drinking water children’s serum and 24 h urine. The values were compared using ANOVA test.
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