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World Journal of Pediatrics

, Volume 10, Issue 1, pp 29–37 | Cite as

Surveillance of childhood blood lead levels in 11 cities of China

  • Tao Li
  • Yao-Hua DaiEmail author
  • Xiao-Hua Xie
  • Zang-Wen Tan
  • Shuai-Ming Zhang
  • Zong-Han Zhu
Original article

Abstract

Background

Exposure to lead can be deleterious to children’s health. Surveillance for blood lead levels (BLLs) is reported every year in the USA and some other countries. However, such reports are lacking in China which has the world’s largest population of children. In this study, we provided the latest nationally representative data on BLLs among Chinese children living in cities, described the change in BLLs since 2004, and explored the risk factors for elevated BLLs (EBLLs) among children.

Methods

We studied 12 693 children aged 0–6 years in 2004 and 11 255 children aged 0–6 years in 2010. We evaluated the average BLLs and the prevalence of EBLLs, and a multivariate logistic regression model was used to estimate predictors of EBLLs.

Results

The geometric mean BLLs of children aged 0–6 years dropped by 16% (from 46.38±2.10 μg/L in 2004 to 38.95±1.83 μg/L in 2010), while the prevalence of EBLLs dropped by 87% (from 9.78% in 2004 to 1.32% in 2010). In a multivariate analysis, the following factors were associated with EBLLs: (1) children being cared for at home or at a boarding nursery (compared to children being cared for in a day nursery), (2) children having fathers with a lower education level, and (3) children often eating popcorn and chewing fingernails or sucking fingers were associated with EBLLs.

Conclusions

The results of this study demonstrated a substantial decline in BLLs from 2004 to 2010 among Chinese children 0–6 years living in cities. However, these levels were higher than levels in countries, such as the USA, Canada, Japan and Sweden. These data demonstrate that Chinese children’s lead exposure remains a public health problem that requires additional effort and resources.

Key words

child gasoline lead surveillance 

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Copyright information

© Children's Hospital, Zhejiang University School of Medicine and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Tao Li
    • 1
  • Yao-Hua Dai
    • 1
    • 3
    Email author
  • Xiao-Hua Xie
    • 1
  • Zang-Wen Tan
    • 1
  • Shuai-Ming Zhang
    • 1
  • Zong-Han Zhu
    • 2
  1. 1.Department of Integrated Early Childhood DevelopmentBeijingChina
  2. 2.Chinese Pediatrician AssociationBeijingChina
  3. 3.Department of Integrated Early Childhood DevelopmentCapital Institute of PediatricsBeijingChina

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