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Validation of a New Food Frequency Questionnaire for Assessment of Calcium and Vitamin D Intake in Korean Women
Journal of Bone Metabolism ; : 67-74, 2013.
Article in English | WPRIM | ID: wpr-159894
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.
Subject(s)

Full text: Available Index: WPRIM (Western Pacific) Main subject: Vitamin D / Vitamins / Diet Surveys / Nutrition Surveys / Calcium / Surveys and Questionnaires / Dairy Products / Korea / Methods Limits: Female / Humans Country/Region as subject: Asia Language: English Journal: Journal of Bone Metabolism Year: 2013 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Vitamin D / Vitamins / Diet Surveys / Nutrition Surveys / Calcium / Surveys and Questionnaires / Dairy Products / Korea / Methods Limits: Female / Humans Country/Region as subject: Asia Language: English Journal: Journal of Bone Metabolism Year: 2013 Type: Article