A Food Frequency Questionnaire for the Assessment of Calcium, Vitamin D and Vitamin K: A Pilot Validation Study

Nutrients

Janet M. Pritchard¹  Tinasha Seechurn¹ 

[1] Faculty of Health Sciences, McMaster University, 1200 Main St W. Hamilton ON L8N 3Z5, Canada;

关键词: osteoporosis;    bone;    calcium;    vitamin D;    vitamin K;    food frequency questionnaire;    validation;   

DOI  :  10.3390/nu2080805

来源: mdpi

【 摘 要 】

The study objective was to validate a food frequency questionnaire (FFQ) to assess calcium, vitamin D and vitamin K intakes in overweight and obese postmenopausal community-dwelling women. The FFQ was validated against intakes derived from a 5-day diet record (5DDR) that also included assessment of supplement intake. Strong correlations between methods were observed for all nutrients (r = 0.63, 0.89, 0.54 for calcium, vitamin D and vitamin K, respectively) and cross-classification analyses demonstrated no major misclassification of participants into intake quartiles. Bland-Altman analysis showed that the FFQ overestimated intakes for calcium, by 576 mg/day (95% CI, −668 to 1,821 mg/day), for vitamin D by 75 IU/day (95% CI, −359 to 510 IU/day), and forvitamin K by 167 mcg/day (95% CI, −233 to 568 mcg/day). This pilot study showed promising validation evidence for the use of this FFQ, which focuses on calcium, vitamin D and vitamin K intakes in postmenopausal women, as a screening tool in clinicaland research settings.

【 授权许可】

CC BY   
© 2010 by the authors; licensee MDPI, Basel, Switzerland.