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目的了解齐齐哈尔市和平小学1~3年级学生的尿铅含量,探讨其尿铅含量的影响因素。方法通过分层整群随机抽样从齐齐哈尔市和平小学1~3年级中,每个年级抽取一个班的学生组成研究对象,收集学生晨尿,采用微分电位溶出法测定尿铅含量,同时利用自制的“儿童尿铅水平及其危险因素调查表”收集学生及其家长的基本信息和影响尿铅水平的相关因素,通过χ2检验和Logistic回归进行统计分析。结果齐齐哈尔市和平小学1~3年级学生尿铅含量的中位数为2.212μg/L,四分位数间距为10.999μg/L。Logistic回归分析显示,学生饭前不洗手、啃指甲以及母亲怀孕或哺乳时在汽车密集的街道旁长时间停留的OR估计值分别为2.298、4.487、1.804,OR95%置信区间的上下限均>1。结论齐齐哈尔市和平小学1~3年级学生尿铅含量整体水平较低;儿童饭前不洗手、啃指甲、母亲怀孕或哺乳时在汽车密集的街道旁长时间停留是影响儿童尿铅水平的主要危险因素。
Objective To understand the urinary lead levels of primary and junior high school students in grade 1 and grade 3 in Qiqihar City and explore the influencing factors of urinary lead levels. Methods A stratified cluster random sampling was conducted from 1st to 3rd grade primary school in Heping Elementary School in Qiqihar City to select a class of students to study the morning urine collection and differential urinalysis to determine urinary lead levels. “Children urine lead level and its risk factors questionnaire ” to collect the basic information of students and their parents and the impact of urinary lead levels related factors, by χ2 test and Logistic regression statistical analysis. Results The median of urinary lead levels in primary and secondary school students in Heping Elementary School in Qiqihar City was 2.212μg / L and the interquartile range was 10.999μg / L. Logistic regression analysis showed that the estimated OR of students who did not wash their hands before eating, nibbling nails and staying in the car-intensive streets for a long time while their mothers were breastfeeding were 2.298, 4.487 and 1.804 respectively, and the upper and lower limits of OR95% confidence interval were both> 1 . Conclusion The overall level of urinary lead levels in primary and secondary school students in Heping Primary Primary School in Qiqihar is relatively low. Children who do not wash hands and nails while eating or nursing their mothers, factor.