1. A New Look for the NHANES Website (NHANES Tutorial)
Rosemarie Hirsch, M.D., M.P.H.
Centers for Disease Control and Prevention
National Center for Health Statistics

2. Here is our new layout, we consolidated our homepage into these 8 main links with two important flashing icons. The new and exciting feature on the homepage is the link to the NHANES web-tutorial.

3. Why was this tutorial created?
NCHS & the National Cancer Institute (NCI) developed the web-based tutorial to
meet growing demands of NHANES data users
promote broader & more proficient use of NHANES data
Efficiently locate pertinent information on the NCHS website
site is constantly updated & evolving
Quickly retrieve NHANES data files & variables
complex structure, may need to merge data
large volume of data available
Correctly conduct statistical analyses
nuances of NHANES data
complex sample design
weighting requirements
data structure

4. Tutorial made up of 17 modules Modules organized into four series
How the Tutorial Works
Tutorial made up of 17 modules
Modules organized into four series
Survey Orientation
Preparing Analytic Dataset
Survey Design Factors
Analyzing Data

5. Survey Orientation 1. Survey Overview 2. Navigate NHANES Website
3. Data Structure & Contents
1st Series

6. Preparing an Analytic Dataset
4. Locate Variables
5. Download Data Files
6. Append & Merge Datasets
7. Clean & Recode Data
8. Format & Label Variables
9. Save Datasets
2nd series

7. Survey Design Factors 10. Sample Design 11. Weighting
12. Variance Estimation
3rd series

8. NHANES Analyses 13. Descriptive Statistics 14. Hypothesis Testing
15. Age Standardization & Population Estimates
16. Linear Regression/ Multivariate Analyses
17. Logistic Regression
4th series – currently under development
Users at 2006 DUC asked us not to wait until it was finished to make it public
Even the help with navigating the web and finding the right variables would “save weeks of work”

9. Each module is free-standing
How the Tutorial Works
Each module is free-standing
Can start anywhere & move around as you wish
later modules often build on previous ones
greater level of statistical & epidemiologic knowledge assumed for later modules

10. “Jump Start Guide” Link

11. Read - “How the Tutorial Works” Use “Navigation Bar” to Pick Topics

12. “Key Concepts” link
“How to” link

13. “Key Concepts” pop-up window
“Print Text” button
“Key Concepts” pop-up window
Using Task 2 – “Find Datasets” as my example here

14. How the Tutorial Works Format varies, depending on the module type
Navigational layout  - split screen
tutorial is on the left
live NHANES website on the right
Analytic layout
Annotated code
Animations available in each lay-out

15. “Print Text” button
Instructions
“Watch
Animation” Link
Module screens have a “print text” button
Includes animated demonstrations
watch and hear the steps

16. Annotated Code

17. Download Sample Code

18. What does the tutorial provide?
Simulates a real life experience - conduct analytical project from beginning to end
Relevant NHANES data information & nuances
Tips & explanations for SAS or SUDAAN programs – STATA code planned
Downloadable sample program code & analytical guidance
New users - a step-by-step course
NHANES data retrieval & analysis
Novice & infrequent users - a self-directed learning tool
supplement their knowledge of the NHANES database & analysis techniques required
Experienced users - a reference
highlight NHANES analytic nuances
provide sample program code

19. Continuing Professional Education Accreditation
CME - Continuing Medical Education for physicians
CNE - Continuing Education in Nursing
CEU - Continuing Education and Training
details, regarding accrediting organizations and number of credits or hours awarded, are on the NHANES tutorial website
Different amounts of credits for type ofcontinuing ed
Web details which modules count toward continuing ed credits

20. Knowledge & Skill Requirements
Basic knowledge and skills in:
sampling & statistical concepts
epidemiological concepts (e.g., prevalence estimates & odds ratios)
statistical analyses (e.g., frequently used descriptive & reference statistics, & correctly interpret the results)
SUDAAN and/or SAS statistical software.
In addition to the knowledge & skills for previous modules, you need…

21. Technical & Software Requirements
To view the tutorial, you need:
Internet browser configured to allow pop-up windows
Monitor resolution of 800x600 pixels or greater
Adobe Acrobat Reader & Adobe Flash 8 player
Speakers - not required to view the tutorial
are necessary if you want to hear the audio narration for the demonstrations
This slide is here for your reference mostly. See the actual website for additional details.

22.
Thank You !
Questions?

23. Disclaimer
The findings and conclusions in this presentation are those of the authors and do not necessarily represent the views of the Centers for Disease Control and Prevention.