Nutrient adequacy : assessment using food consumption surveys / Subcommittee on Criteria for Dietary Evaluation, Coordinating Committee on Evaluation of Food Consumption Surveys, Food and Nutrition Board, Commission on Life Sciences, National Research Council.

Format:

Book

Author/Creator:

National Research Council (U.S.). Coordinating Committee on Evaluation of Food Consumption Surveys. Subcommittee on Criteria for Dietary Evaluation.

Language:

English

Subjects (All):

Nutrition surveys--United States.

Nutrition surveys.

Diet--United States.

Diet.

Physical Description:

1 online resource (158 p.)

Edition:

1st ed.

Place of Publication:

Washington, D.C. : National Academy Press, 1986.

Language Note:

English

Summary:

Just how accurately can adequate nutrient intake be measured? Do food consumption surveys really reflect the national diet? This book includes a brief history of dietary surveys, and an analysis of the basis of dietary evaluation and its relationship to recommended dietary allowances. A discussion of how usual dietary intake may be estimated from survey data, a recommended approach to dietary analysis, and an application of the analysis method is presented. Further, an examination of the impact of technical errors, the results of confidence interval calculations, and a summary of the subcommittee's recommendations conclude the volume.

Contents:

Nutrient Adequacy

Copyright

Preface

Contents

1 Executive Summary

MAJOR CONCLUSIONS

MAJOR RECOMENDATIONS

2 Introduction

3 Nutrient Requirements as a Basis for Dietary Evaluation

VARIABILITY OF NUTRIENT REQUIREMENTS

LEVELS OF REQUIREMENT

FIXED CUTOFF POINTS

4 The Use of Short-Term Dietary Intake Data to Estimate Usual Dietary Intake

RELATIONSHIP OF DAILY DIETARY INTAKE DATA TO USUAL INTAKE

PROCEDURE FOR ADJUSTING INTAKE DATA

5 The Probability Approach

REQUIREMENT INFORMATION NEEDED FOR THE PROBABILITY APPROACH

EFFECT OF REQUIREMENT DISTRIBUTION ON ESTIMATES OF THE PREVALENCE OF INTAKE ADEQUACY

Influence of Mean and Standard Deviation of Requirement

Influence of the Shape of Requirement Distribution

Impact of the Mode in Which Requirements Are Expressed

Impact of Criteria for Requirement Estimate

Comparison with Fixed Cutoff Approach

SUMMARY

6 Assessing Excessive Intake and Nutrient Energy Ratios

FAT INTAKE

NONNUTRIENTS

Assessment of the Prevalence of Excessive Intake

ENERGY FROM PROTEIN, FAT, AND CARBOHYDRATE

USE OF THE PROBABILITY APPROACH TO ASSESS ENERGY INTAKE

7 Errors in Nutrient Intake Measurement

SAMPLING VARIATION

Random Error

Systematic Bias

ERRORS IN ESTIMATING USUAL NUTRIENT INTAKE

Errors in Reporting Usual Food Intake

Day-to-Day Variation in Intake

Variability in Reporting and Recording Food Intake

Variability Due to Coding and Analysis of the Nutrient Content of Foods

Sources of Technical Errors in Food Composition

Nutrient Data with Probable Bias

Vitamin A

Carotenoids

Vitamin B12

Vitamin C

Folacin

IMPACT OF SYSTEMATIC BIAS

8 Modeling of Sources of Variability and Biases

VARIABILITY DUE TO SAMPLING OF RESPONDENTS

RANDOM VARIABILITY IN FOODS CONSUMED

VARIABILITY IN FOOD COMPOSITION DATA.

EFFECT OF RANDOM STATISTICAL ERROR ON ESTIMATION OF PREVALENCE

IMPACT OF RANDOM UNDER-AND OVERREPORTING

9 Conclusions and Recommendations

ANALYSIS OF DIETARY ADEQUACY

STUDY DESIGN

SENSITIVITY ANALYSIS

IMPROVEMENT OF THE FOOD COMPOSITION DATA BASE

PREREQUISITES AND LIMITATIONS OF THE PROPOSED APPROACH

Acceptable Precision of the Estimates

Estimation of Usual Food Intake

Computation of Nutrient Intake

Definition of Nutrient Requirements

CONCLUSIONS

References

Statement Concerning Application of the Recommended Method

NUTRIENT REQUIREMENT INFORMATION

ESTIMATES OF NUTRIENT INTAKE

CONCLUSION

Appendix A Adjustment of Intake Distributions Used in This Report

REFERENCES

Appendix B Derivation of Criteria for Interpreting Iron Intake in Women

Appendix C Method of Estimating Confidence Intervals

DESCRIPTION OF METHOD

ESTIMATING THE DISTRIBUTION OF ACTUAL INTAKES F(X)

The Parametric Method

The Nonparametric Approach

Assumptions of the 95% Confidence Interval

Appendix D Algorithm for Computing the Probability of Intake Inadequacy

REFERENCE

Appendix E Analysis of Error in the Estimation of Nutrient Intake Using Three Sample Data Sets

VARIABILITY OF FOOD COMPOSITION

Effect of Increasing the Number of Foods in the Diet

RANDOM ERROR IN THE MEASUREMENT OF FOOD INTAKE

REFERENCES.

Notes:

Bibliographic Level Mode of Issuance: Monograph

Includes bibliographical references.

ISBN:

1-280-22209-3

9786610222094

0-309-59459-6

0-585-14370-6

OCLC:

70772893