|
Activity Number:
|
491
|
|
Type:
|
Invited
|
|
Date/Time:
|
Thursday, August 7, 2008 : 10:30 AM to 12:20 PM
|
|
Sponsor:
|
SSC
|
| Abstract - #300321 |
|
Title:
|
National Nutrition Data: Methodological and Analytic Experiences of NHANES
|
|
Author(s):
|
Clifford L. Johnson*+ and Leyla Mohadjer and Lester R. Curtin
|
|
Companies:
|
Centers for Disease Control and Prevention and Westat, Inc. and Centers for Disease Control and Prevention
|
|
Address:
|
3311 Toledo Road, Hyatsville, MD, 20782,
|
|
Keywords:
|
dietary methods ; NHANES ; nutrition
|
|
Abstract:
|
This presentation provides a history of the evolution of the methods for the collection and analysis of nutrition data at NCHS/CDC. The NHANES Survey began collecting nutrition data in 1971. The nearly 40 years of NHANES experience is summarized in terms of the many changes in mode (paper questionnaires, CAPI, and telephone), methods (repeated 24 hour recalls and food frequency), survey participation rates, and the data base for processing the nutrition information. In addition, the survey design and the statistical methods for analyzing the data have changed over time. NHANES has moved from a 6-year periodic survey to an annual survey with data released in two year cycles. The current design is recognized to have analytic issues related to seasonality and small number of PSUs. The impact of these changes will be discussed in terms of their impact on time trends for nutrition data.
|
- The address information is for the authors that have a + after their name.
- Authors who are presenting talks have a * after their name.
Back to the full JSM 2008 program |
