U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 Food Surveys Research Group: Beltsville, MD
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    CareersSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Northeast Area Beltsville, Maryland (BHNRC) Beltsville Human Nutrition Research Center Food Surveys Research Group Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications
- FSRG Home Page
- FSRG Main Menu
- WWEIA
- Dietary Methods Research
- What's In the Foods You Eat Search Tool
- FNDDS
- AMPM
- FPED
- FICRCD
- FSRG Listserv
- Food Surveys 1935-1998

Title:   Author  item
                                            FREEDMAN, LAURENCE - Information Management Services, Incitem
                                            COMMINS, JOHN - Information Management Services, Incitem
                                            WILLETT, WALTER - Harvard School Of Public Healthitem
                                            TINKER, LESLEY - Fred Hutchinson Cancer Research Centeritem
                                            SPIEGELMAN, DONNA - Harvard School Of Public Healthitem
                                            Rhodes, Donnaitem
                                            POTISCHMAN, NANCY - National Cancer Institute (NCI, NIH)item
                                            NEUHOUSER, MARIAN - Fred Hutchinson Cancer Research Centeritem
                                            Moshfegh, Alannaitem
                                            Baer, Daviditem
                                            KIPNIS, VICTOR - National Cancer Institute (NCI, NIH)item
                                            ARAB, LENORE - Geffen School Of Medicineitem
                                            PRENTICE, ROSS - Fred Hutchinson Cancer Research Centeritem
                                            SUBAR, AMY - National Cancer Institute (NCI, NIH)
  Submitted to: American Journal of Epidemiology
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 8/2/2016
                                    Publication  Date: 7/1/2017
                                    Citation: Freedman, L.S., Commins, J.M., Willett, W., Tinker, L.F., Spiegelman, D., Rhodes, D.G., Potischman, N., Neuhouser, M.L., Moshfegh, A.J., Kipnis, V., Baer, D.J., Arab, L., Prentice, R.L., Subar, A. 2017. Evaluation of the 24-hour recall as a reference instrument for calibrating other self-report instruments in nutritional cohort studies:  Evidence from the Validation Studies Pooling Project. American Journal of Epidemiology. 186(1):73-82. https://doi.org/10.1093/aje/kwx039.DOI: https://doi.org/10.1093/aje/kwx039                                                              
                                Interpretive Summary: Measurement error is inherent in self-reported dietary assessment instruments and leads to biased estimates of diet-disease associations in nutritional cohort studies.  Currently, the most commonly used main instrument in dietary cohort studies is a food frequency questionnaire (FFQ), and the most commonly used reference instruments are multiple 24-hour recalls.  Results from five large validation studies with biomarkers were pooled for common analysis in order to evaluate the 24-hour recall as a reference instrument for calibrating a FFQ.  In nutritional cohort studies based on FFQ reports, 24-hour recalls can be used as reference instruments for adjusting estimates of associations of health outcome with continuous dietary intakes for measurement error.  Such use reduces but does not completely eliminate the bias in the risk estimates for continuous dietary intakes and provides over-optimistic estimates of correlations between FFQ and true intake.
                                Technical Abstract: Dietary self-report instruments involve errors and require calibration for proper interpretation of results.  However, only a limited set of biomarkers can be used for calibration, so most investigators use self-report instruments, such as 24-hour recalls.  We evaluate the performance of 24-hour recalls as reference instruments.  We used data from the Validation Studies Pooling Project, a set of five large dietary reporting validation studies using recovery biomarkers.  For food frequency questionnaire (FFQ) reported intakes of energy, protein, potassium and sodium and their densities, we compared estimates of the following FFQ parameters using biomarkers with those using 24-hour recalls:  attenuation factors, correlations with truth, and calibration equations.  We assessed the bias in estimated relative risk resulting from using 24HRs as reference instruments compared to the bias resulting from making no adjustment for measurement error.  Using 24HRs as reference instruments, attenuation factors were substantially overestimated for absolute energy and sodium intakes, but less for protein and potassium and hardly at all for densities.  Correlations with truth were substantially overestimated for all dietary components.  Calibration equations did not capture dependencies of personal characteristics, especially body mass index.  In a disease model with energy and one or more nutrient intakes, the bias in the estimated nutrient relative risks was on average reduced, but the bias in the risk coefficient for energy was unchanged.  Using 24HRs as reference instruments for adjusting relative risk estimates for intakes on a continuous scale improves results in comparison to making no adjustment for measurement error.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov