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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
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 eval...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Japan Epidemiological Association
2007
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10468340/ https://www.ncbi.nlm.nih.gov/pubmed/12033533 http://dx.doi.org/10.2188/jea.12.85 |
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author | Tokudome, Yuko Imaeda, Nahomi Nagaya, Teruo Ikeda, Masato Fujiwara, Nakako Sato, Juichi Kuriki, Kiyonori Kikuchi, Shogo Maki, Shinzo Tokudome, Shinkan |
author_facet | Tokudome, Yuko Imaeda, Nahomi Nagaya, Teruo Ikeda, Masato Fujiwara, Nakako Sato, Juichi Kuriki, Kiyonori Kikuchi, Shogo Maki, Shinzo Tokudome, Shinkan |
author_sort | Tokudome, Yuko |
collection | PubMed |
description | 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. |
format | Online Article Text |
id | pubmed-10468340 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2007 |
publisher | Japan Epidemiological Association |
record_format | MEDLINE/PubMed |
spelling | pubmed-104683402023-09-01 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 Tokudome, Yuko Imaeda, Nahomi Nagaya, Teruo Ikeda, Masato Fujiwara, Nakako Sato, Juichi Kuriki, Kiyonori Kikuchi, Shogo Maki, Shinzo Tokudome, Shinkan J Epidemiol Original Article 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. Japan Epidemiological Association 2007-11-30 /pmc/articles/PMC10468340/ /pubmed/12033533 http://dx.doi.org/10.2188/jea.12.85 Text en © 2002 Japan Epidemiological Association. https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Original Article Tokudome, Yuko Imaeda, Nahomi Nagaya, Teruo Ikeda, Masato Fujiwara, Nakako Sato, Juichi Kuriki, Kiyonori Kikuchi, Shogo Maki, Shinzo Tokudome, Shinkan 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 |
title | 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 |
title_full | 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 |
title_fullStr | 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 |
title_full_unstemmed | 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 |
title_short | 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 |
title_sort | 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 |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10468340/ https://www.ncbi.nlm.nih.gov/pubmed/12033533 http://dx.doi.org/10.2188/jea.12.85 |
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