Abstracts: ISEE 21st Annual Conference, Dublin, Ireland, August 25–29, 2009: Poster Presentations
To evaluate Chinese children's blood lead levels (BLLs) and identify its distribution features together with its trend with times and to provide data for policy development to the prevention on environmental lead pollution.
Articles on children BLLs published from 2004 to Aug, 2007, with sampling time since 2001, using Chinese Biomedical Disk (CBMDisk), Chinese Journal Full-test Database (CJFD) and other ways were collected. Finally 35 articles eligible for the following criteria were reviewed: (1) BLLs measured by Atomic Absorption Spectroscopy (graphite or others) or Inductively Coupled Plasma-mass Spectrometry; (2) strict quality control; (3) no local lead pollution sources in the areas where the screened subjects live; (4) sample size bigger than 100. The data also was compared with the former study carried out in 2004 with articles studying time between 1995 and 2003.
The mean BLLs of Chinese children between 2001 and 2007 was 80.7ug/L (45.5∼165.3ug/L) and 23.9% (3.2%∼80.7%) of the subjects have BLLs higher than 100ug/L, both of which are lower than the levels of 1995 to 2003. Four of 24 provinces or cities reported had average BLLs≥100ug/L. Of the 24 provinces or cities, only four have higher BLLs and prevalence rates of elevated BLLs than that of 1995 to 2003. The mean BLLs of children living in industrial areas were higher than children in urban and suburbs areas, suburbs higher than urban areas, and showed a statistically significant difference. The BLL of boys was 79.3ug/L, significantly higher than girls 76.9ug/L (P < 0.001), while both of which are getting lower than the former study. BLLs of children ≤6 years increased with ages and decreased compared with the former study.
The BLLs of children in China were getting lower with times but still higher than some developed countries, suggesting that prevention and control of lead poisoning for children would be a long-term mission for the whole nation.