The Fourth National Report on Human Exposure to Environmental Chemicals: Updated Tables, March 2021 (the Updated Tables, March 2021) presents nationally representative, cumulative biomonitoring data gathered from 1999–2000 through 2015–2016. It includes all the data from each of the previous National Reports on Human Exposure to Environmental Chemicals and each of the previous Updated Tables (collectively, the Report and Updated Tables).

In each survey period, the reported chemicals or their metabolites were measured in blood, serum, and urine samples from random subsamples of the National Health and Nutrition Examination Survey (NHANES). These subsamples typically consisted of about 2,500 participants – exact numbers are included in the tables. Survey data and samples are collected by the Centers for Disease Control and Prevention (CDC) National Center for Health Statistics. CDC’s Environmental Health Laboratory (Division of Laboratory Sciences (DLS), National Center for Environmental Health) used mass spectrometry methods to obtain the blood, serum, and urine exposure measurements presented in the Report and Updated Tables.

Volume Four contains data tables for a special sample of adult cigarette smokers and nonsmokers.

Volume Four: Analysis of Chemicals Found in Cigarette Smoke in a Special Sample of U.S. Adults, NHANES 2011-2016 provides data for a sample of adult cigarette smokers and nonsmokers from NHANES 2011-2012, 2013–2014, and 2015-2016. The Special Sample was created to determine the effectiveness of tobacco product standards under The Family Smoking Prevention and Tobacco Control Act of 2009. Of note, the age for eligibility in the Special Sample decreased from 20 years and older in NHANES 2011–2012 to 18 years and older in NHANES 2013–2014 and 2015–2016 (NHANES lowered the age for asking the smoking questions in 2013).

CS272983-A

FourthReport_UpdatedTables_Volume4_Mar2021-508.pdf