Applying Recovery Biomarkers to Calibrate Self-Report Measures of Energy and Protein in the Hispanic Community Health Study/Study of Latinos.
Bottom Line: Higher body mass index and Hispanic/Latino background were associated with underestimation of energy (P<0.05).Systematic underreporting of energy and protein intakes and overreporting of protein density were found to vary significantly by Hispanic/Latino background.We developed calibration equations that correct for subject-specific error in reporting that can be used to reduce bias in diet-disease association studies.
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Mentions: Figure 2 shows the main and reliability studies for the biomarker and self-reported intakes, along with the within-person correlations. The reliability of the biomarker, that is, the correlation between the repeat measures from the reliability subset, was r = 0.81 for energy, 0.66 for protein, and 0.59 for protein density. For 24-hour dietary recall, r = 0.58 for energy intake, r = 0.51 for protein intake, and r = 0.24 for protein density. For protein and protein density, a sensitivity analysis was performed to investigate whether excluding observations with extremely low urinary volume (below the 10th percentile), reflecting potential incompleteness of the 24-hour urine collection, influenced the regression calibration coefficients. As presented in Web Table 1, the results were similar to those in Table 5, while the strength of evidence for language preference was weakened slightly.Figure 2.