Cluster means of the 15 standardized log-transformed urinary metals
using k-means in the SWAN data. Y-axis (cluster means) represents the mean
standardized natural log-transformed urinary creatinine adjusted metal
concentrations. Cluster 1: “high” overall metal exposure pattern;
cluster 2: “low” overall metal exposure pattern. As: arsenic, Ba:
barium, Cd: cadmium, Co: cobalt, Cs: cesium, Cu: copper, Hg: mercury, Mn:
manganese, Mo: molybdenum, Ni: nickel, Pb: lead, Sb: antimony, Sn: tin, Tl:
thallium, Zn: zinc.