Table 3.

Correlation between total Cu and Zn concentrations and Copper δ⁶⁵ and Zinc δ⁶⁴ results for controls and children with ASD using the Kendall Tau-b correlation test.

Zn			Cu
	Kendall Tau-b correlation coefficient	p-value		Kendall Tau-b correlation coefficient	p-value
Males
Overall	−0.58	0.020	Overall	−0.36	0.15
ASD	−0.74	0.08	ASD	−0.20	0.62
Control	−0.80	0.050	Control	−0.60	0.14
Females
Overall	0.09	0.72	Overall	0.04	0.86
ASD	−0.20	0.62	ASD	0.20	0.62
Control	0.40	0.33	Control	−0.20	0.62