martes, 19 de agosto de 2014

CDC - National Report on Human Exposure to Environmental Chemicals - NER

CDC - National Report on Human Exposure to Environmental Chemicals - NER



The Updated Tables, August 2014 provides nationally-representative biomonitoring data from CDC’s National Health and Nutrition Examination Survey (NHANES) that has become available since the publication of the Fourth Report in 2009. The Updated Tables, August 2014 is being released because of errors in NHANES sampling weights that were recently discovered by the National Center for Health Statistics (NCHS) in selected data files for NHANES 2011-2012. 
 The Updated Tables, July 2014, were withdrawn August 8, 2014 after NHANES discovered and alerted us to an error in sampling weights in selected data files for NHANES 2011-2012. This was in addition to a previous NHANES issue involving sample weights for the chemicals measured in pooled samples for survey years 2005-2006 and 2007-2008.   
All individual and pooled data tables impacted by sampling weight errors have been removed from this release. When corrected files are available from NHANES, we will recalculate summary data and add those tables to a future update. For additional details, see the Introduction section of the Updated Tables, August 2014.
The Updated Tables, August 2014 and additional resources are now available on CDC’s National Exposure Report webpage.

Download the Updated Tables, August 2014
NEW Updated Tables, August 2014 Adobe PDF file [PDF - 28,246 KB]
Revised August 2014
The Updated Tables, July 2014, were withdrawn August 8, 2014 after NHANES discovered and alerted us to an error in sampling weights in selected data files for NHANES 2011-2012. This was in addition to a previous NHANES issue involving sample weights for the chemicals measured in pooled samples for survey years 2005-2006 and 2007-2008 and which resulted in withdrawing the pooled data tables.
This Updated Tables, August 2014, includes NHANES 2011-2012 data not affected by the sampling weight error. When the corrected files are available from NHANES, we will recalculate our summary data and add those tables to a future release. For additional details, see theIntroduction section of the Updated Tables, August 2014 Adobe PDF file.
Download the Fourth Report, 2009
Fourth Report, 2009 Adobe PDF file [PDF - 6,517 KB]
The Fourth National Report on Human Exposure to Environmental Chemicals, 2009, (the Fourth Report, 2009) presents data for 212 chemicals. The Fourth Report includes the findings from nationally representative samples for 1999-2004.
The blood and urine samples reported in both publications were collected from participants in CDC's National Health and Nutrition Examination Survey (NHANES), which obtains and releases health-related data from a nationally representative sample in two year cycles.

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