Validity of Smaller Sample Sizes for the Dish-based Component Table to Use with the Self-reported "Dietary Record by Cooked Dishes"
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概要
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The validity was assessed of the "Dietary Record by Cooked Dishes" (DRcd) method, a newly developed and simplified self-reported dietary record, together with a smaller sample size for constructing the dish-based component table.Scale-based one-day dietary records were compiled by 224 subjects from 2000 to 2002, the amounts of nutrients in each dish were calculated by using the 5th standard food composition table, and the results were used to construct the dish-based component table (DRcd224). Databases for DRcd125 and DRcd75, which respectively used 125 and 75 samples from the 224 subjects randomly selected 5 times from each, were next constructed in the same way. A one-day dietary survey using the DRcd databases was finally conducted on 106 subjects in 2003 and 2004 to assess the validity of the method.The median values of Pearson's correlation coefficients for the intake of energy, of 29 nutrients, and of 21 food groups between DR and DRcd224 were 0.808 and 0.921, respectively. The correlation coefficients of the minimum and maximum values of the 5-times calculation for DRcd125 were 0.701 and 0.754 (nutrients), and 0.685 and 0.796 (food groups), and for DRcd75 were 0.686 and 0.724, and 0.662 and 0.726, respectively. The ratio of the energy intake assessed by DRcd224 to that by DR was 92.2%, and the ratios of the median values for nutrients assessed by DRcd125 and DRcd22275 to DRcd224 were 97.5-102.8% and 99.2-104.8%, respectively.Although the correlation coefficients between DR and DRcd224 were higher than those for DRcd125 and DRcd75, there was little effect from this difference in estimating the dietary intake. A sample size of 75 would therefore be practical for constructing DRcd in field research.
- 特定非営利活動法人 日本栄養改善学会の論文
特定非営利活動法人 日本栄養改善学会 | 論文
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