. Author manuscript; available in PMC: 2020 Jul 10.

Published in final edited form as: J Trace Elem Med Biol. 2020 Jan 8;59:126452. doi: 10.1016/j.jtemb.2020.126452

Table 3.

Correlation between metal and the mortality of Alzheimer’s disease.

Metal	Soil horizon	Spearman correlation coefficient	P value
Arsenic	A soil horizon	0.552	0.004
	C soil horizon	0.616	0.001
	Total soil horizon	0.622	0.001
Lead	A soil horizon	0.324	0.114
	C soil horizon	0.344	0.092
	Total soil horizon	0.342	0.094
Cadmium	A soil horizon	0.429	0.032
	C soil horizon	0.395	0.051
	Total soil horizon	0.388	0.055
Mercury	A soil horizon	0.200	0.337
	C soil horizon	0.333	0.104
	Total soil horizon	0.265	0.201

Note: A soil horizon is the soil concentration in the eluvial horizon, C soil horizon is the soil concentration in the parent material horizon, Total soil horizon is the soil concentration in the eluvial horizon plus the soil concentration in the parent material horizon.