关键词: 儿童, 齿铅, 生长发育, 多因素分析

Abstract: AbstractObjectiveTo understand the relationship between lead load and its effects on children's growth in this area by measuring the lead content with teeth lead as reference sample. MethodsSamples collected by Huzhou Matemal and Children Care Hosital between June 2002 and February 2004 were randomly selected from 10 urban and rural kindergartens in Huzhou area,and teeth lead content in deciduous teeth (up incisor) analyzed among 171 children;ROC method was used to identify the high threshold of teeth lead level. ResultsThe high threshold of teeth lead was 19.50μg /g;by analyzing the correlation between growth index and teeth lead concentration (logarithmic conversion),it is shown that there was a reciprocal relationship between high threshold of teeth lead and height (r=-0.370，P<0.01) with statistical significance,and no statistical relationship between high threshold of teeth lead and weight or head size.With teeth lead as a variant,a progressive modeling of multiplelinear regression was adopted to show that teeth lead had statistical significance on eight factors such as children’s attention,height and professions of mothers (F=10.312 P<0.01). ConclusionLead contamination from mother's profession,canned food,nailgnawing habit and nutritional deficiency are the main factors to contribute to the increase of lead concentration of children in this area.

Key words: Multifactor analysis , Teeth lead, Growth