Table 2.

Prevalence of elevated Cu and deficient Zn concentrations in PTC patients and healthy controls in comparison to international reference ranges.

Reference values	PTC	Healthy	P-value	Reference
	patients (%)	controls (%)
Cu [μg/L]			0.0001	(29)
n % (Cu ≤ 804 μg/L)	0	14
n % (804 < Cu <1,620 μg/L)	84	86
n % (Cu ≥ 1,620 μg/L)	16	0
Zn [μg/L]			0.0001	(30)
n % (Zn ≤ 785 μg/L)	26	0
n % (785 < Cu <1,046 μg/L)	46	68
n % (Cu ≥ 1,046 μg/L)	28	32