TY - JOUR
T1 - Reproducibility of a food frequency questionnaire
T2 - Korea Nurses' Health Study
AU - Song, Sihan
AU - Kim, Bohye
AU - Pang, Yanghee
AU - Kim, Oksoo
AU - Lee, Jung Eun
N1 - Funding Information:
This work was supported by the Research Program funded by the Korea National Institute of Health (2013-E63006-00, 2013-E63006-01, 2019-ER710-100, 2019-ER710-102).
Publisher Copyright:
© 2022 The Korean Nutrition Society and the Korean Society of Community Nutrition.
PY - 2022/2
Y1 - 2022/2
N2 - BACKGROUND/OBJECTIVES: This study aimed to examine the reproducibility of food frequency questionnaires (FFQs) designed for young female nurses in the Korea Nurses' Health Study. SUBJECTS/METHODS: 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. RESULTS: 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. CONCLUSIONS: The results indicated that the web-based FFQ used in the Korea Nurses' Health Study has acceptable reproducibility.
AB - BACKGROUND/OBJECTIVES: This study aimed to examine the reproducibility of food frequency questionnaires (FFQs) designed for young female nurses in the Korea Nurses' Health Study. SUBJECTS/METHODS: 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. RESULTS: 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. CONCLUSIONS: The results indicated that the web-based FFQ used in the Korea Nurses' Health Study has acceptable reproducibility.
KW - Food frequency questionnaire
KW - Korea Nurses' Health Study
KW - Reproducibility
UR - http://www.scopus.com/inward/record.url?scp=85124826258&partnerID=8YFLogxK
U2 - 10.4162/nrp.2022.16.1.106
DO - 10.4162/nrp.2022.16.1.106
M3 - Article
AN - SCOPUS:85124826258
VL - 16
SP - 106
EP - 119
JO - Nutrition Research and Practice
JF - Nutrition Research and Practice
SN - 1976-1457
IS - 1
ER -