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Thirteen-Year Trends in Dietary Patterns among Japanese Adults in the National Health and Nutrition Survey 2003?2015: Continuous Westernization of the Japanese Diet.

ABSTRACT: We examined 13-year trends in dietary patterns, using data from the National Health and Nutrition Survey, Japan 2003?2015. In repeated, independent cross-sectional studies, dietary intake was assessed with a one-day weighed dietary record in 88,527 Japanese adults aged ?20 years. Using principal component analysis based on the daily consumption of 31 food groups, we identified three dietary patterns, the "plant food and fish", "bread and dairy", and "animal food and oil" patterns. In the whole sample, the "plant food and fish" pattern score decreased while the "bread and dairy" and "animal food and oil" pattern scores increased. The decreasing trends in the "plant food and fish" pattern were observed in all subgroups considered. The increasing trends in the "bread and dairy" pattern were similar across sexes and by current smoking status. However, in terms of age, occupation, and weight status, the increasing trends were only evident in particular subgroups (i.e., age 50?64 and ?65 years; security/transportation/labor occupation and nonworker; and normal weight and overweight participants). For the "animal food and oil" pattern, the increasing trends were observed in all subgroups, except for the youngest age group (20?34 years old). This study suggests continuous Westernization of the Japanese diet.

SUBMITTER: Murakami K

PROVIDER: S-EPMC6115850 | biostudies-other | 2018 Jul

REPOSITORIES: biostudies-other

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Project description:Background2,4-Dichlorophenol (2,4-DCP), 2,5-dichlorophenol (2,5-DCP), and their precursors are widely used in industry and in consumer products. Urinary concentrations of these dichlorophenols (DCPs) have been measured as part of four National Health and Nutrition Examination Survey (NHANES) cycles in order to assess the exposure to these compounds or their precursors among the general U.S. population.ObjectivesWe identified predictors and evaluated trends in DCP concentrations according to race/ethnicity, age, sex, family income, and housing type.MethodsWe used analysis of covariance to examine associations of various demographic parameters and survey cycle with urinary concentrations of DCPs during NHANES 2003-2010. We also conducted weighted logistic regressions to estimate associations of DCP concentrations above the 95th percentile with housing type, race/ethnicity, and income.ResultsWe detected DCPs in at least 81% of participants. Geometric mean (GM) urinary concentrations were higher for 2,5-DCP (6.1-12.9 ?g/L) than 2,4-DCP (0.8-1.0 ?g/L) throughout 2003-2010. Adjusted GM concentrations of the DCPs among children (6-11 years of age) and adults > 60 years of age were higher than among adolescents and other adults. Adjusted GM concentrations among non-Hispanic whites were lower than among non-Hispanic blacks and Mexican Americans, although differences according to race/ethnicity were less pronounced among participants in high-income households. Among non-Hispanic blacks and Mexican Americans, adjusted GM concentrations were lowest among high-income participants relative to other income groups, with a monotonic decrease with increasing income among Mexican Americans. Type of housing and race/ethnicity were significant predictors of DCP urinary concentrations above the 95th percentile. Furthermore, urinary DCP concentrations have showed a downward trend since 2003.ConclusionsExposure to DCPs and their precursors was prevalent in the general U.S. population in 2003-2010. We identified age and race/ethnicity, family income, and housing type as predictors of exposure to these compounds.

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Thirteen-Year Trends in Dietary Patterns among Japanese Adults in the National Health and Nutrition Survey 2003?2015: Continuous Westernization of the Japanese Diet.

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