Lead Biomarkers and Serum Iron Indices by HFE Genotypes [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; HH, wild-type; HD, H63D heterozygous variant; DD, H63D homozygous variant.*(**) p (0.01) compared with HH (student's t-test or nonparametric test).aBecause of missing data, the numbers do not equal 771.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.

缩写说明：BPb（blood lead，血铅）、UPb（urine lead，尿铅）、ZPP（zinc protoporphyrin，锌原卟啉）、sFe（serum iron，血清铁）、UIBC（unsaturated iron-binding capacity，不饱和铁结合力）、TIBC（total iron binding capacity，总铁结合力）、Tf（transferrin，转铁蛋白）、TfS（serum transferrin saturation，血清转铁蛋白饱和度）、sFn（serum ferritin，血清铁蛋白）、sTfR（soluble transferrin receptor，可溶性转铁蛋白受体）、BIC（body iron content，机体铁含量）、Hb（haemoglobin，血红蛋白）、HH（wild-type，野生型）、HD（H63D heterozygous variant，H63D杂合变异型）、DD（H63D homozygous variant，H63D纯合变异型）。*(**) 与野生型（HH）组相比，p=0.01（采用学生t检验或非参数检验）。a 因存在数据缺失，实际样本量并非771。若连续变量符合正态分布，结果以均值±标准差（mean ± SD）表示；若连续变量不符合正态分布，结果以中位数M（P25，P75）表示。