CDC en Español

Search:
National Center for Health Statistics Monitoring the Nation's Health

NHANES Dietary Web Tutorial

  • Email this page

Tutorial Learning Objectives

The list below outlines the objectives for each course in the tutorial.  After completing the modules, users should be able to do the following:

 

 

Survey Orientation

Module 1: Dietary Data Overview

Task 1: Describe the History of Dietary Data Collection

Task 2: Describe NHANES Dietary Data Collection Methods

Task 3: Describe Uses of the Dietary Data

Module 2: Navigate NHANES Website

Task 1: Navigate the NHANES Homepage

Task 2: Locate Datasets on the NHANES Website

Task 3: Locate Survey Background Information

Task 4: Locate the Analytic and Reporting Guidelines

Task 5: Locate Other Useful Information on the NHANES Website

Module 3: Dietary Data Structure & Contents

Task 1: Describe How Dietary Data Fit into the NHANES Data Structure

Task 2: Describe Dietary Recall Data Files
Task 3: Describe Food Frequency Data Files
Task 4: Describe Dietary Supplement Data Files

Module 4: Resources for Dietary Data Analysis

Task 1: Describe the Food and Nutrient Database for Dietary Studies (FNDDS)
Task 2: Describe the USDA Food Coding Scheme
Task 3: Describe the Food Surveys Research Group (FSRG)-Defined Food Groups
Task 4: Describe the What’s In the Foods You Eat Search Tool
Task 5: Describe the MyPyramid Equivalents Database

Module 5: Overview of NHANES Survey Design and Weights

Task 1: Explain NHANES Survey Design
Task 2: Explain NHANES Sample Weights

 

Preparing a Dietary Analytic Dataset

Module 6: Locate Variables

Task 1: Identify Dietary Recall Variables and Their File Locations         
Task 2: Identify Food Frequency Variables and Their File Locations
Task 3: Identify Dietary Supplement Variables and Their File Locations
Task 4: Identify Correct Sample Weights and Their File Locations

Module 7: Download Data Files

Task 1: Create Folders
Task 2: Download Data Files and Documentation
Task 3: Extract and Copy NHANES Data Files in a Permanent Library

Module 8: Merge & Append Datasets

Task 1: Merge NHANES Data
Task 2: Append NHANES Data

Module 9: Review Data & Create New Variables

Task 1: Identify, Recode, and Evaluate Missing Data
Task 2: Check for Skip Patterns and Explain How They Affect Results
Task 3: Check the Data for Influential Outliers
Task 4: Create New Variables

Module 10: Format & Label Variables

Task 1: Define and Assign Formats and Labels

Module 11: Save a Dataset

Task 1: Create a permanent dataset in a SAS library

 

Basic Dietary Analyses

Module 12: Identify Important Statistical Considerations Regarding Dietary Data Analyses

Task 1: Define Measurement Error
Task 2: Explain Usual Intake and Day-To-Day Variation in Dietary Intakes
Task 3: Check for Data Symmetry
Task 4: Identify Analytic Implications about Different Types of Dietary Data

Module 13: Estimate Variance and Analyze Subgroups

Task 1: Use SUDAAN and SAS to Estimate Variance
Task 2: Use SUDAAN to Analyze Subgroups

Module 14: Estimate Population Mean Intakes

Task 1: Estimate Mean Food Intakes
Task 2: Estimate Mean Nutrient Intakes from Foods and Beverages
Task 3: Estimate Mean Nutrient Intakes from Supplements
Task 4: Estimate Mean Total Nutrient Intakes

Module 15: Estimate Ratios

Task 1: Estimate Food Sources of Nutrients
Task 2: Estimate Population-level Ratios of intake

Module 16: Test Hypotheses

Task 1: Estimate Prevalence of Supplement Intake
Task 2: Estimate Distributions of Food Intake
Task 3: Estimate Distributions of Nutrient Intake
Task 4: Estimate Distributions of Total Nutrient Intake from Foods and Supplements 

 

Advanced Dietary Analyses

Module 17. Estimate Prevalence and Examine Relationships Using Supplement Data

Module 18. Model Usual Intake Using Dietary Recall Data

Module 19. Estimate Population-Level Distributions of Usual Dietary Intake

Module 20. Evaluate the Effects of Covariates on Usual Dietary Intakes

Module 21. Examine the Relationship Between Usual Dietary Intake and Some Outcome Measure

Module 22. Examining Usual Total Nutrient Intake from Supplements and Diet

 

Page Last Modified: November 20, 2008

Basic Dietary Analyses

Advanced Dietary Analyses

Additional Resources

National Center for Health Statistics
3311 Toledo Road
Hyattsville, MD 20782
Phone: 1-866-441-NCHS (6247)
For data inquiries, use
nchsquery@cdc.gov

 

Problems or comments about the Tutorial?
Email the Tutorial Team: NHANESWebTutorial@cdc.gov

Safer Healthier People

Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30333, U.S.A
Tel: (404) 639-3311 / Public Inquiries: (404) 639-3534 / (800) 311-3435