Blood lead level and associated factors among preschool children in Haikou City from 2015 to 2018 / 中国学校卫生

ABSTRACT

Objective@#To explore blood lead level and associated factors among preschool children in Haikou city,and to provide a reference for early detection and timely intervention of children’s lead poisoning.@*Methods@#Stratified random cluster sampling method was used to select 22 038 children from 23 kindergartens in Haikou city from 2015 to 2018. Blood lead level was examined and a questionnaire survey was conducted.@*Results@#The average blood lead level was 22.45 μg/L, with 22.55 μg/L for boys, 23.33 μg/L for girls, 23.09 μg/L for 3-year-old group, 22.13 μg/L for 4-year-old group, 22.58 μg/L for 5-year-old, and 22.10 μg/L for 6-year-old. On average, about 0.50% of the total children was found of high blood lead level, the prevalence decreased by year during 2015-2018 which was 0.80%, 0.62%, 0.47%, and 0.11%, respectively. The high blood lead rate was 0.45% for boys, 0.57% for girls, 0.46% for 3-year-old, 0.37% for 4-year-old, 0.61% for 5-year-old, and 0.56% for 6-year-old. Hyperactivity, inattention, anorexia, frail disease, stomach ache, pale and anemia was found higher in high lead group and 50~99 μg/L group than those in 0~49 μg/L group. Multivariate logistic regression analysis showed that mother’s occupational exposure to lead was positively correlated with children’s high blood lead level. Frequent toy cleaning and outings were negatively correlated with high blood lead levels in children.@*Conclusion@#The high blood lead level of children is closely related to some factors,such as,their living condition,living habits and so on.Theretore,a regular detection of blood lead should be conducted. Parents should be educated about childhood lead poisoning, as well the need to prevent and intervene in daily life.