National Academies Press: OpenBook

WIC Nutrition Risk Criteria: A Scientific Assessment (1996)

Chapter: Appendix D Definitions of Yield and Sensitivity of Cutoff Points for Nutrition Risk

« Previous: Appendix C WIC Program: Common Nutritional Risk Criteria
Suggested Citation:"Appendix D Definitions of Yield and Sensitivity of Cutoff Points for Nutrition Risk ." Institute of Medicine. 1996. WIC Nutrition Risk Criteria: A Scientific Assessment. Washington, DC: The National Academies Press. doi: 10.17226/5071.
×
Page 359
Suggested Citation:"Appendix D Definitions of Yield and Sensitivity of Cutoff Points for Nutrition Risk ." Institute of Medicine. 1996. WIC Nutrition Risk Criteria: A Scientific Assessment. Washington, DC: The National Academies Press. doi: 10.17226/5071.
×
Page 360

Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.

APPENDIX D 359 Appendix D Definitions of Yield and Sensitivity of Cutoff Points for Nutrition Risk Efficacy of WIC interventions: the proportion of individuals selected for WIC whose bad outcomes will be prevented or reduced = where Y = those identified who have the risk and will benefit w = those identified who have the risk and will not benefit Overall benefit from WIC Identified by criterion Yes No Yes Y w Yield of risk1: the proportion of those identified at risk who are at risk = where B = those identified at risk who are at risk o = those identified at risk who are not at risk 1 Yield of risk is called positive predictive value in epidemiology (Last, 1988).

APPENDIX D 360 At risk of bad outcome Identified by criterion Yes No Yes B o No b O Not all those who have the risk and are identified at risk (B) will benefit, thus: Combining equations D-2 and D-3: Yield of benefit: proportion of those identified at risk who will benefit = Sensitivity for risk2 = Sensitivity for benefit: REFERENCES Habicht, J-P. 1980. Some characteristics of indicators of nutritional status for use in screening and surveillance. Am. J. Clin. Nutr. 33:531-535. Habicht, J-P., L.D. Meyers, and C. Brownie. 1982. Indicators for identifying and counting the improperly nourished. Am. J. Clin. Nutr. 35:1241-1254. Last, J.M. 1988. A Dictionary of Epidemiology. London: Oxford University Press. 2 Nutritional examples of tradeoffs between specificity and sensitivity are discussed in Habicht (1982), and the relationship of specificity-sensitivity tradeoffs to the positive predictive value are discussed in Habicht (1980).

Next: Appendix E Biographical Sketches »
WIC Nutrition Risk Criteria: A Scientific Assessment Get This Book
×
Buy Paperback | $53.00 Buy Ebook | $42.99
MyNAP members save 10% online.
Login or Register to save!
Download Free PDF

This book reviews the scientific basis for nutrition risk criteria used to establish eligibility for participation in the U.S. Department of Agriculture's Special Supplemental Nutrition Program for Women, Infants, and Children (WIC). The volume also examines the specific segments of the WIC population at risk for each criterion, identifies gaps in the scientific knowledge base, formulates recommendations regarding appropriate criteria, and where applicable, recommends values for determining who is at risk for each criterion. Recommendations for program action and research are made to strengthen the validity of nutrition risk criteria used in the WIC program.

  1. ×

    Welcome to OpenBook!

    You're looking at OpenBook, NAP.edu's online reading room since 1999. Based on feedback from you, our users, we've made some improvements that make it easier than ever to read thousands of publications on our website.

    Do you want to take a quick tour of the OpenBook's features?

    No Thanks Take a Tour »
  2. ×

    Show this book's table of contents, where you can jump to any chapter by name.

    « Back Next »
  3. ×

    ...or use these buttons to go back to the previous chapter or skip to the next one.

    « Back Next »
  4. ×

    Jump up to the previous page or down to the next one. Also, you can type in a page number and press Enter to go directly to that page in the book.

    « Back Next »
  5. ×

    To search the entire text of this book, type in your search term here and press Enter.

    « Back Next »
  6. ×

    Share a link to this book page on your preferred social network or via email.

    « Back Next »
  7. ×

    View our suggested citation for this chapter.

    « Back Next »
  8. ×

    Ready to take your reading offline? Click here to buy this book in print or download it as a free PDF, if available.

    « Back Next »
Stay Connected!