Validation of a New Food Frequency Questionnaire for Assessment of Calcium and Vitamin D Intake in Korean Women.
10.11005/jbm.2013.20.2.67
- Author:
Yongsoon PARK
1
;
Sang Hee KIM
;
Yong Taek LIM
;
Yong Chan HA
;
Jae Suk CHANG
;
I Seok KIM
;
Yong Ki MIN
;
Ho Yeon CHUNG
Author Information
1. Department of Food and Nutrition, Hanyang University, Seoul, Korea. yongsoon@hanyang.ac.kr
- Publication Type:Original Article
- Keywords:
Calcium;
Diet surveys;
Korean women;
Vitamin D;
Questionnaires
- MeSH:
Calcium*;
Dairy Products;
Diet Surveys;
Female;
Humans;
Korea;
Methods;
Nutrition Surveys;
Vitamin D*;
Vitamins*;
Surveys and Questionnaires
- From:Journal of Bone Metabolism
2013;20(2):67-74
- CountryRepublic of Korea
- Language:English
-
Abstract:
BACKGROUND: Validated simple calcium questionnaires are available to assess the intake of calcium and vitamin D in western countries, but they are not appropriate for Koreans since dairy products are not the major source of calcium and vitamin D in Korea. Thus, the objective of the present study was to develop and validate a simple and easy food frequency questionnaire (FFQ) of calcium and vitamin D for Korean. METHODS: Two hundred and fifty-six women were asked to complete the validated FFQ used by the Korean National Health and Nutrition Examination Survey (KNHANES) and a newly developed FFQ, the Korean Calcium Assessment Tool (KCAT), which contain the 7 food groups with 24 categories of 45 food items that are consumed frequently by Koreans. RESULTS: Calcium intake was not significantly different between the two methods; Pearson's correlation coefficient of 0.98 indicated a positive correlation, and Cohen's kappa coefficient of 0.78 indicated the subjects were correctly classified. Bland-Altman plot also showed that the mean differences of the calcium intake as assessed by the two methods were in high agreement. However, the vitamin D intake assessed by KCAT was significantly higher than that assessed by the FFQ used in KNHANES. The vitamin D intakes as assessed by the two methods were positively correlated but the two methods were in moderate agreement. CONCLUSIONS: The results suggested that the newly developed KCAT was a valid tool for assessing the calcium intake in Korean women, but it might overestimate the vitamin D intake.
