Table 4.

Pearson correlations between element concentrations in hair and blood

Element	n	r	p-value
Fe	46	0.083	0.585
Cu	47	-0.049	0.745
Mn	45	0.269	0.074
Zn	45	-0.204	0.179
Se	47	-0.028	0.851
Cr	46	0.068	0.652
Pb	44	0.384**	0.010
Hg	45	0.601***	0.000
Cd		a	a
As	42	0.022	0.889

n, number of dogs included for each element; r, Pearson correlation coefficient

**Correlation is significant at the 0.01 level (2-tailed)

***Correlation is significant at the 0.001 level (2-tailed)

^aCannot be computed because hair Cd is constant