TABLE J-8NHANES Sample Sizes of Population Subgroups Selected for Nutrient and Food Intake Analyses: Phases I and II

Population SubgroupSample Sizes
NHANES 2005–2008NHANES 2011–2012NHANES 2005–2012a
NutrientsFoodsNutrientsFoodsNutrientsFoods
WIC
Women, pregnant————165139
Women, breastfeeding————2725
Women, postpartum————6254
Infants, FF, 0 to less than 6 months204—b93———
Infants, FF, 6 to less than 12 months252—b98———
Infants, BF, 6 to less than 12 months———39c3939
Children, 1 to less than 2 years3112639681——
Children, 2 to less than 5 years474402263228——
Eligible, Non-WICd
Women, pregnant————8758
Infants, FF, 0 to less than 6 months211915———
Infants, FF, 6 to less than 12 months353116———
Infants, BF, 6 to less than 12 months———68c88
Children, 1 to less than 2 years106824125——
Children, 2 to less than 5 years397329217148——
Low-Income, Ineligiblee
Women, not pregnant, BF, or postpartum————2,6111,983

NOTES: — = data not analyzed except where indicated; BF = breastfed/breastfeeding; FF = formula-fed; NHANES = National Health and Nutrition Examination Survey. Food intake was not analyzed for infants because there exist only intake recommendations for specific types of foods and consumption of formula complicates assessment of intake. Non-WIC breastfeeding and postpartum women were not analyzed due to small sample sizes. Sample sizes differ between the nutrient and food intake analyses because at least 2 days of intake data are required to estimate usual intakes for food.

a

Except for BF infants, for which NHANES survey years are 2009–2012.

b

Data are available in the phase I report (NASEM, 2016), but are not included in this appendix.

c

Intake of meat only was evaluated for these infants. Data are presented in Chapter 4.

d

Eligible, non-WIC indicates individuals who reported income at or below 185 percent of the federal poverty level but did not identify as WIC participants in the NHANES survey.

e

Women were categorized as ineligible if they reported income below 185 percent of the federal poverty level but did not meet the WIC physiological requirements.

From: Appendix J, Nutrient and Food Intake of WIC Subgroups: Analytical Methods and Results

Cover of Review of WIC Food Packages
Review of WIC Food Packages: Improving Balance and Choice: Final Report.
National Academies of Sciences, Engineering, and Medicine; Health and Medicine Division; Food and Nutrition Board; Committee to Review WIC Food Packages.
Washington (DC): National Academies Press (US); 2017 May 1.
Copyright 2017 by the National Academy of Sciences. All rights reserved.

NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.