Lead Biomarkers, Serum Iron Indices and Genotypes by Exposure [Mean ± SD or N (%) or M (P₂₅, P₇₅)].

Abbreviations: BPb, blood lead; UPb, urine lead; ZPP, zinc protoporphyrin; sFe, serum iron; UIBC, unsaturated iron-binding capacity; TIBC, total iron binding capacity; Tf, transferrin; TfS, serum transferrin saturation; sFn, serum ferritin; sTfR, soluble transferrin receptor; BIC, body iron content; Hb, haemoglobin. For H63D genotype, HH, wild-type; HD, H63D heterozygous variant; DD, H63D homozygous variant. For C282Y genotype, CC, wild-type; CY, C282Y heterozygous variant; YY, C282Y homozygous variant. *(**) p<0.05 (0.01) (Chi-square test, Student's t-test or nonparametric test) compared with the unexposed group of the same sex. Results were expressed as the mean ± SD when continuous variables followed a normal distribution. Results were expressed as M (P25, P75) when continuous variables did not follow a normal distribution.