Daily, Weekly, Seasonal, Within- and Between-individual Variation in Nutrient Intake According to Four Season Consecutive 7 Day Weighed Diet Records in Japanese Female Dietitians.
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- Tokudome Yuko
- Nagoya-Bunri College
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- Imaeda Nahomi
- Nagoya City School of Nutrition
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- Nagaya Teruo
- Nagoya City University Medical School
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- Ikeda Masato
- University of Occupational and Environmental Health
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- Fujiwara Nakako
- Nagoya City University School of Nursing
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- Sato Juichi
- Nagoya University Hospital
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- Kuriki Kiyonori
- Nagoya City University Medical School
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- Kikuchi Shogo
- Aichi Medical University School of Medicine
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- Maki Shinzo
- Aichi Prefectural Dietetic Association
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- Tokudome Shinkan
- Nagoya City University Medical School
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Abstract
Objective:To study daily, weekly, seasonal, within and between-individual variance in intake of selected nutrients and minimal days necessary for assessing true intake with a specified degree of error based on four season consecutive 7 day weighed diet records (WDRs).Subjects and Methods:We evaluated consumption of energy and 30 nutrients based on four season consecutive 7 day WDRs from 80 Japanese female dietitians in 1996-1997.We examined daily, weekly, seasonal, within- and between-individual variation in nutrient intake, relative contributions of their variances to total variance, and minimal days required to estimate a person's nutrient intake within 10% and 20% of their true mean with 95% confidence intervals.Results:The relative contributions of variation for all nutrients by person were larger than those by day, week and season.Within-individual variances were greater than the between-individual variances.The ratios of within- vs.between-individual variances thus ranged from 1.3 - 26.9.Minimal days necessary for estimating nutrient consumption per person within 10% (20%) of the true mean with 95% confidence intervals ranged from 10-35 (3-9) days for energy and major nutrients and 15-640 (4-160) days for micro-nutrients.Conclusions:The relative contributions of variability by person were largest for all nutrients, followed by those due to sequence of days, season and day of week.Within-individual variation was greater than between-individual variation.Minimal days necessary for ascertaining major nutrients were in general fewer than micro-nutrients.<br> J Epidemiol, 2002;12:85-92
Journal
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- Journal of Epidemiology
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Journal of Epidemiology 12 (2), 85-92, 2002
Japan Epidemiological Association
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Details 詳細情報について
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- CRID
- 1390001204473684480
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- NII Article ID
- 130000797517
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- NII Book ID
- AA10952696
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- COI
- 1:STN:280:DC%2BD383ptlCmtA%3D%3D
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- ISSN
- 13499092
- 09175040
- http://id.crossref.org/issn/09175040
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- PubMed
- 12033533
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- PubMed
- CiNii Articles
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- Abstract License Flag
- Disallowed