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Comparison of relative validity of nutrient intake estimated by comprehensive and grief-type self-administered diet history questionnaires against 16 d dietary records in Japanese adults - Article Example

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The study involved ninety-two Japanese women of between 31 and 69 years and ninety-two Japanese men of between 32 and 76 years (12).
The objective of the study…
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Comparison of relative validity of nutrient intake estimated by comprehensive and grief-type self-administered diet history questionnaires against 16 d dietary records in Japanese adults
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"Comparison of relative validity of nutrient intake estimated by comprehensive and grief-type self-administered diet history questionnaires against 16 d dietary records in Japanese adults"

Download file to see previous pages for the calculation of energy-adjusted values using regression and also used the Pearson correlation coefficients hence making the results more valid and reliable (78). The nutrient intakes deprived from the first DHQ and the first BDHQ was compared with the intake from the 4 day DRs. (80). The correlation coefficients were then compared using the Meng-Rosental-Rubin method to identify overlapping correlation coefficients (93).
The study design was appropriate in assessing the relative validity of the DHQ and BDHQ. First, through the DHQ, the statisticians were able to estimate the dietary intake, behavior and consumption frequency of the participants during the preceding period. The study design used the DHQ that was able to ask for the consumption frequency and the portion sizes of the 150 food and beverages (60). On the other hand, the BDHQ provided the researchers with the opportunity to compare the dietary intake of some selected foods, although not based on the portion size (58).
In addition, the reasonable sample size for a validation study is between 200-300 participants with three days of dietary measurements. In this case, the number of participants was 182 and the dietary measurement days were 4 which fall within the reasonable sample size.
4. The two energy-adjusted methods are relatively similar in results. From the findings, in the case of the crude intake of the 42 nutrients and the residual method, the researchers observed that the differences were insignificant. It was observed that energy adjusted nutrients by residual methods produces better results for women while energy adjusted by the density method produces similar outcomes for both men and women. From the first method, the DR and BDHQ1 nutrients intake were at 67% and 43% for women respectively and 26% and 64% for men respectively (101).
For the energy adjusted for nutrient density, there was no significant differences that was observed in 13, 16 for the DHQ, BDHQ. Conceivably, it means ...Download file to see next pagesRead More
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