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National Health and Nutrition Examination Survey

Note on 2007-2010 Sampling Methodology

Starting in 2007, a new sampling methodology was implemented. We oversampled all Hispanics, not just Mexican Americans (Table 1). In addition, for each of the race/ethnicity domains, the 12-15 and 16-19 year age domains were combined and the 40-59 year age minority domains were split into 10 year age domains 40-49 and 50-59 (Table 2). This has led to an increase in the number of participants aged 40+ and a decrease in 12-19 year olds from previous cycles. Lastly, we no longer oversampled pregnant women. Based on these changes some variables have been modified from previous release cycles.

Table 1. Unweighted sample size and percent by race/ethnicity from NHANES 2005-06, 2007-08 and 2009-2010 for examined participants
Race / Ethnicity Number (2005-06) Percent (2005-06) Number (2007-08) Percent (2007-08) Number (2009-10) Percent (2009-10)
Hispanic-Mexican American 2,73927.52,06421.12,30522.5
Hispanic-Other Hispanic 3303.31,14711.71,10310.8
Non-Hispanic Black 2,61526.32,14121.91,90318.6
Non-Hispanic White 3,77838.03,96940.74,31742.1
Other 4884.94414.56256.1
Total 9,9501009,76210010,253100

Table 2. Unweighted sample size and percents by age groups from NHANES 2005-06, 2007-08 and 2009-2010 for examined participants
Age group (years) Number (2005-06) Percent (2005-06) Number (2007-08) Percent (2007-08) Number (2009-10) Percent (2009-10)
0-5 1,86418.71,63016.71,66216.2
6-11 1,10611.11,21512.41,22211.9
12-19 2,20722.21,21012.41,31012.8
20-39 1,83918.51,84418.92,03319.8
40-59 1,44614.51,81818.62,02119.7
60+ 1,48815.02,04520.92,00519.6
Total 9,9501009,76210010,253100

 
  • Page last reviewed: November 6, 2015
  • Page last updated: September 30, 2011
  • Content source: CDC/National Center for Health Statistics
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