Table 3. Correlations between arsenic and other elements in well water and human samples.

		Mg	Ca	Sr	Ba
As	Well water	0.74**	0.74**	−0.66**	0.87**
	Urine	0.34	0.11	0.18	0.46*
	Nail	0.25	0.06	0.22	0.53**
	Hair	0.05	0.14	−0.14	0.56**

Spearman’s rank correlation coefficients (n = 30) for correlation between arsenic and other elements (magnesium, calcium, strontium and barium) in well drinking water and human urine, toenail and hair samples obtained in Bangladesh are shown. * and **, Statistically significant correlation (*, p<0.05; **, p<0.01).