Unit 1 Presentation and using the additional web-based resources at the bottom of the worksheet. Note that the mean blood lead levels provided in the table are estimates based upon available data and plausible exposures; a brief explanation of their derivation is provided in the discussion notes. Possible responses to Activity 1.1 are included below. Activity 1.1: Historical comparisons of elevated blood lead levels (eBLLs) Referring to the table, students are asked to answer the following questions (possible responses are in Date Location Mean Source BLL Adapted from All 2 year old Riva, M.A., A. Lafranconi, M.I. D’orso, and G. Cesana. 2011. Lead 3500 children in .016 Poisoning: Historical Aspects of a Paradigmatic and BCE area now µg/dL “Occupational Environmental Disease.” Safety and Health at Work; 3(1): 11-16. called USA http://dx.doi.org/10.5491/SHAW.2012.3.1.11 Mean for 2 year old Blood Lead Levels United States, 1988-1991. August 05, 1994 / 1970 15 µg/dL – children in 43(30); 545-548. USA http://www.cdc.gov/mmwr/preview/mmwrhtml/00032080.htm 1970 Boston, MA 20 µg/dL Extrapolated from national average CDC data 2010 Boston, MA 3 µg/dL Extrapolated from national average CDC data Mean for 2 year old Blood Lead Levels in Children Aged 1-5 Years United States, 2010 1.5 µg/dL – children in 1999-2010. April 05, 2013 / 62(13); 245-248. USA http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6213a3.htm italics): This table shows the approximate mean blood lead level (BLL) of 2-year-old children in several different places at different times in history.
Unit 1 Presentation and using the additional web-based resources at the bottom of the worksheet. Note that the mean blood lead levels provided in the table are estimates based upon available data and plausible exposures; a brief explanation of their derivation is provided in the discussion notes. Possible responses to Activity 1.1 are included below. Activity 1.1: Historical comparisons of elevated blood lead levels (eBLLs) Referring to the table, students are asked to answer the following questions (possible responses are in italics): This table shows the approximate mean blood lead level (BLL) of 2-year-old children in several different places at different times in history. Date Location Mean BLL Source 3500 BCE All 2 year old children in area now called USA .016 µg/dL Adapted from Riva, M.A., A. Lafranconi, M.I. D’orso, and G. Cesana. 2011. Lead Poisoning: Historical Aspects of a Paradigmatic “Occupational and Environmental Disease.” Safety and Health at Work; 3(1): 11-16. http://dx.doi.org/10.5491/SHAW.2012.3.1.11 1970 Mean for 2 year old children in USA 15 µg/dL Blood Lead Levels – United States, 1988-1991. August 05, 1994 / 43(30); 545-548. http://www.cdc.gov/mmwr/preview/mmwrhtml/00032080.htm 1970 Boston, MA 20 µg/dL Extrapolated from national average CDC data 2010 Boston, MA 3 µg/dL Extrapolated from national average CDC data 2010 Mean for 2 year old children in USA 1.5 µg/dL Blood Lead Levels in Children Aged 1-5 Years – United States, 1999-2010. April 05, 2013 / 62(13); 245-248. http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6213a3.htm
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