Evaluation of Daily Intake of Dietary Fiber Basedon a Long-Term Diet Record Noritaka TOKUI1, YoshimiMlNARI2,
Takesumi YOSHIMURA1 and Satoshi INNAMI3 1Department of Clinical Epidemiology, Institute ofIndustrial Ecological Sciences,
University of Occupational and Environmental Health
2Division of Food and Nutrition, Nakamura Gakuen JuniorCollege
3Department of Nutritional Sciences, Faculty of AppliedBiosciences,
Tokyo University of Agriculture The aim of this study is to evaluate the intake ofdietary fiber based on four 4-week diet records. The subjects forthis study are women who are resident in Fukuoka Prefecture. Validdiet records were obtained from 34 subjects. Daily intakes of totaldietary fiber (TDF), soluble dietary fiber (SDF) and insolubledietary fiber(IDF) were calculated from these diet records. Inaddition, proportion of DF intake from each food relative to totalintake of DF was also computed to identify what foods contribute tototal intake of DF. Average daily intakes of TDF, SDF and IDF were9.5±4.9g, 1.6±1.1g, 7.7±3.8g,respectively. Average daily intake of TDF was lower than 10g. InTDF intake by foods, proportion of DF intake from rice showed 10.3%relative to total intake of DF, which was the most contributedfood. SDF intake from orange showed the highest proportion (9.3%)relative to total intake of SDF.
As in TDF intake, IDF intake from rice resulted in the mostdominant one (12.7% ). Proportions of intake from top fifty foodscontributing to total intake of DF in TDF, SDF and IDF were 86.7% ,89.9 % and 88.9% , respectively. The cumulative proportions offoods contributing to intake of DF in TDF, SDF and IDF showed theplateau at about 100 foods. These results suggest that averagedaily intake of DF at a long-term diet record indicated the lowervalue than ever reported ones. This may occur because ofdifferences in the methods for dietary assessment or areas ofsurvey. Further study based on a long-term diet record is requiredto examine the intake of DF in daily life.
Key words: intake of dietary fiber, nutritional epidemiology,dietary record, seasonal variation |
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