Table 4.

Cu, Zn, Se, and Mn serum levels by age groups

Elements	Age (years)		P-value
	< 55 (n = 109)	≥ 55 (n = 117)
Zn	68.7 ± 16.18	67.1 ± 17.51	0.36
Cu	96.01 ± 21.55	95.5 ± 16.215	0.67
Mn	2.8047 ± 1.11801	2.38 ± 90	0.006
Se	128.92 ± 34.01	124.48 ± 27.37	0.23

Zn: zinc, Cu: copper, Mn: manganese, Se: selenium.