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- W3185001471 abstract "This study aimed to examine the reproducibility of food frequency questionnaires (FFQs) designed for young female nurses in the Korea Nurses' Health Study.The reproducibility of web-based, self-administered FFQs was evaluated among 243 Korean female nurses. The first FFQ (FFQ1) was administered from March 2014 to February 2019 and the second FFQ (FFQ2) from November 2019, with a mean interval of 2.8 years between the FFQs (range, 9 months-5.6 years). Pearson and Spearman correlation coefficients (r values) and quartile agreements between FFQ1 and FFQ2 were calculated for intakes of energy, nutrients, and foods.Pearson correlation coefficients ranged from 0.41 to 0.55 (median r = 0.51) for energy and raw nutrients and from 0.16 to 0.46 (median r = 0.36) for energy-adjusted nutrients. Spearman correlation coefficients ranged from 0.25 to 0.72 (median r = 0.41) for food items. The percentages of women who were classified into the same or adjacent quartile were 77% to 84% (median = 82%) for raw nutrients and 69% to 86% (median = 78%) for foods.The results indicated that the web-based FFQ used in the Korea Nurses' Health Study has acceptable reproducibility." @default.
- W3185001471 created "2021-08-02" @default.
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- W3185001471 date "2022-01-01" @default.
- W3185001471 modified "2023-10-14" @default.
- W3185001471 title "Reproducibility of a food frequency questionnaire: Korea Nurses' Health Study" @default.
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- W3185001471 doi "https://doi.org/10.4162/nrp.2022.16.1.106" @default.
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