Patterns of Exposure to Multiple Metals and Associations with Neurodevelopment of Preschool Children from Montevideo, Uruguay

Table 3

Mean hair arsenic, cadmium, manganese, and blood lead concentrations in participant groups according to the latent class analysis.

	Cluster 1; “Low metal exposure”	Cluster 2; “Low-to-moderate metal exposure”	Cluster 3; “High lead and cadmium”	Cluster 4; “High metal exposure”
Cluster size	0.7231	0.1909	0.0636	0.0224
Hair manganese (µg/g)^2	0.7081	1.2271	3.2436	6.5836
Hair arsenic (µg/g)^2	0.0726	0.1733	0.3878	5.6398
Hair cadmium (µg/g)^2	0.0973	0.2884	0.6294	0.1222
Blood lead (µg/L)^2	6.4138	4.4624	8.3307	7.4579

Values given as proportion of the study sample represented by the cluster; ²values given as mean concentration of a given metal in each cluster; highest mean concentrations of each metal appearing in bold.