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Table 3 Lead, calcium, lead per unit calcium, cadmium and fluoride content of bone samples of CKDu cases vs. controls

From: Evidence of selected nephrotoxic elements in Sri Lankan human autopsy bone samples of patients with CKDu and controls

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
  1. * 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