Combining biomarker and self-reported dietary intake data: A review of the state of the art and an exposition of concepts.
Classical approaches to assessing dietary intake are associated with measurement error. In an effort to address inherent measurement error in dietary self-reported data there is increased interest in the use of dietary biomarkers as objective measures of intake. Furthermore, there is a growing consensus of the need to combine dietary biomarker data with self-reported data. A review of state of the art techniques employed when combining biomarker and self-reported data is conducted. Two predominant methods, the calibration method and the method of triads, emerge as relevant techniques used when combining biomarker and self-reported data to account for measurement errors in dietary intake assessment. Both methods crucially assume measurement error independence. To expose and understand the performance of these methods in a range of realistic settings, their underpinning statistical concepts are unified and delineated, and thorough simulation studies are conducted. Results show that violation of the methods' assumptions negatively impacts resulting inference but that this impact is mitigated when the variation of the biomarker around the true intake is small. Thus there is much scope for the further development of biomarkers and models in tandem to achieve the ultimate goal of accurately assessing dietary intake.
['Gormley|Isobel Claire|IC|0000-0001-7713-681X', 'Bai|Yuxin|Y|', 'Brennan|Lorraine|L|']
D000465:Algorithms D015415:Biomarkers D002138:Calibration D004032:Diet D004435:Eating D005260:Female D006801:Humans D008297:Male D057566:Self Report
biomarkers self-reported dietary intake data Measurement error calibration method method of triads