Next Article in Journal
Moderate Alcohol Consumption Inhibits Sodium-Dependent Glutamine Co-Transport in Rat Intestinal Epithelial Cells in Vitro and Ex Vivo
Next Article in Special Issue
Reproducibility and Relative Validity of the Healthy Eating Index-2015 and Nutrient-Rich Food Index 9.3 Estimated by Comprehensive and Brief Diet History Questionnaires in Japanese Adults
Previous Article in Journal
Changes in Microbiota and Bacterial Protein Caseinolytic Peptidase B During Food Restriction in Mice: Relevance for the Onset and Perpetuation of Anorexia Nervosa
Previous Article in Special Issue
Metabolic Trajectories Following Contrasting Prudent and Western Diets from Food Provisions: Identifying Robust Biomarkers of Short-Term Changes in Habitual Diet
Open AccessArticle

Reliability of Repeated Measures of Nutrient Intake by Diet Records in Residents in the Western Region of Japan

1
Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
2
Department of Epidemiology, Harvard T.H Chan School of Public Health, Boston, MA 02115, USA
3
Channing Division of Network Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
4
School of Public Health, Zhejiang University, Hangzhou 310027, China
*
Author to whom correspondence should be addressed.
Nutrients 2019, 11(10), 2515; https://doi.org/10.3390/nu11102515
Received: 3 September 2019 / Revised: 10 October 2019 / Accepted: 14 October 2019 / Published: 18 October 2019
Objective: We aimed to assess the day-to-day variation in twelve one-day diet records over one year from 131 residents of urban and rural areas in the western region of Japan. Methods: Between 2014 and 2015, the participants provided repeated one-day diet records once a month. We estimated the intraclass correlation coefficient (ICCs) for intakes for energy and 39 crude and energy-adjusted nutrients using linear mixed models. Results: Among the unadjusted nutrients, ICCs ranged from 0.05 (95 percent confidence interval = 0.03–0.09) for vitamin A retinol equivalent (RE) to 0.55 (95% CI = 0.48–0.62) for potassium. After energy adjustment, the ICCs were 0.02 (95 percent confidence interval = 0.03–0.09) for vitamin A (RE) and 0.52 (95 percent confidence interval = 0.45–0.59) for potassium. Intakes of energy-adjusted macronutrients tended to have moderate degrees of day-to-day coefficients of variation (CVw, range = 0.13–0.23, mean = 0.18), while the coefficients of variation for intakes of micronutrients varied dramatically (CVw, range = 0.17–2.59, mean = 0.54). Conclusion: There were large day-to-day variations in nutrient intake assessed by diet records among urban and rural residents in the western region of Japan. This study provided information on the reproducibility of crude and energy-adjusted nutrients that may be useful for other dietary studies in Japanese populations. View Full-Text
Keywords: Intraclass Correlation Coefficient (ICC); reliability; energy adjustment; diet record within-person and between-person variation Intraclass Correlation Coefficient (ICC); reliability; energy adjustment; diet record within-person and between-person variation
MDPI and ACS Style

Yoshizawa, K.; Willett, W.C.; Yuan, C. Reliability of Repeated Measures of Nutrient Intake by Diet Records in Residents in the Western Region of Japan. Nutrients 2019, 11, 2515.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop