Objective To explore and current stituation related risk factors of blood lead levels in urban children from Hohhot,in order to provide measures for intervention. Methods The stratified random sampling method was used to select 2 009 children aged 0~3 taking regular physical examination,and 1 822 children aged 3~6 from 4 kindergartens in 4 urban areas of Hohhot.The blood lead level was measured by atomic absorption spectrometer,and children's parents were asked to answer a standardized questionnaire. Result...