|
Variable
|
CKDu (n = 14)
|
controls (n = 33)
|
z value*
|
p value
|
|---|
|
Mean
|
SD
|
Mean
|
SD
|
|---|
|
Lead μg/g
|
1.09
|
0.80
|
0.66
|
0.42
|
−1.815
|
0.070
|
|
Calcium μg/g
|
70,740.32
|
30,713.50
|
72,081.67
|
46,981.64
|
−0.837
|
0.402
|
|
Calcium adjusted lead ×10−6
|
14.68
|
7.51
|
10.38
|
5.74
|
−2.256
|
0.024
|
|
Cadmium μg/g
|
0.030
|
0.037
|
0.036
|
0.042
|
−0.782
|
0.434
|
|
Mercury μg/g
|
0.002
|
0.003
|
0.002
|
0.003
|
0.000
|
1.000
|
|
Fluoride μg/g
|
594.16
|
335.82
|
22.49
|
44.50
|
−5.719
|
< 0.001
|
- * As the dataset was not normally distributed, the non-parametric test (Mann-Whitney U test) was performed to compare the two means and the z statistic was calculated by the Mann-Whitney U test
