关键词: 中小学生, 尿铅, 影响因素

Abstract: Objective To explore the status and influencing factors for urine lead level of primary and middle school students in Liuzhou city. Methods A stratified cluster random sampling method was used to select 2 047 primary and middle school students from 12 schools of 4 areas as participants from October 2018 to November 2018. Urine samples were collected and the urine levels were tested by inductively coupled plasma-mass spectrometer (ICP-MS). Multiple linear regression model was used to analyze related risk factors affecting urine lead levels. Results The detection rate of urine lead was 99.80%, and the geometrical mean of urinary lead level was 2.147 μg/g creatinine. The level of serum lead in children at the age of 6—11 years old was significantly higher than other groups (H=270.003, P<0.001), and the urine lead level of girls was significantly higher than that of boys (Z＝-2.046, P=0.041). Multivariate analysis showed that often having freshwater fish, street food and snacks, and playing electronics were positively correlated with urinary lead level(β=0.947、1.250、1.056、1.262,P<0.05), while often eating vegetables and fruits were negatively related to urinary lead level(β=-0.866、-0.951,P<0.05). Conclusions Urine lead level of children in Liuzhou is influenced by many factors, such as age, the house dwelling, children's behavior habit and dieting habit. Relevant health education should be widely provided to children and parents, so as to reduce the hazard of lead for children.

Key words: primary and middle school students, urine lead, influencing factors