BACKGROUND/OBJECTIVES The purpose of this study was to develop a dish-based semiquantitative food frequency questionnaire s(FFQ) for Korean adolescents and evaluate its reproducibility and validity. SUBJECTS/METHODS Based on 24-hour dietary recall data from the 4th Korean National Health and Nutrition Examination Survey (KNHANES), we developed a FFQ with 71 items. From a quota sample of 160 a...

The objective of this study was to compare the dietary calcium intakes assessed by a quantitative food frequency questionnaire (FFQ) and the three-day food record method in 230 Chinese postmenopausal women aged 50-65 years in Kuala Lumpur. The results showed that the mean calcium intake from the dietary records was 447+/-168 mg/day and 499+/-211 mg/day from the FFQ. The mean difference in intak...

There is growing interest in the use of dietary patterns as measures of exposure in studies of diet-disease relationships. However, relatively little is known about the impact of the type of dietary assessment method on the patterns observed. Using FFQ and food diary data collected from 585 women in early pregnancy we used principal component analysis to define dietary patterns. The first patte...

BACKGROUND Validation of a food frequency questionnaire (FFQ) is important as incorrect information may lead to biased associations. Therefore the relative validity of an FFQ developed for use in the German Health Examination Survey for Adults 2008-2011 (DEGS) was examined. METHODS Cross-sectional comparisons of food consumption data from the FFQ and from two 24-hour recalls were made in a sa...

BACKGROUND Food frequency questionnaires (FFQs) are essential tools to investigate the relationship between peanut consumption and the development of peanut allergy. The aim was to validate a 50-item FFQ for use in peanut protein sensitization studies. METHODS There were 38 mother-child pairs visiting a pediatric clinic of a London hospital included. Mothers recorded their own and their child...

This study, conducted in the Netherlands in 1994-1996, assessed the reproducibility, validity, and responsiveness of a food frequency questionnaire (FFQ) used with older subjects with type 2 diabetes. During a period of 6 months, 93 subjects had a stable protein intake according to their urinary urea excretion (UUE). An FFQ was completed before and after this period. Reproducibility was evaluat...

BACKGROUND AND OBJECTIVES Despite the demonstrated protective effects of green tea and coffee intake against several chronic diseases, finding between studies have not been consistent. One potential reason of this discrepancy is the imprecision in the measurement of tea or coffee consumption using food frequency questionnaire (FFQ) and food record (FR) in epidemiological studies. METHODS AND ...

BACKGROUND The validity of estimates of dietary intake calculated using a food frequency questionnaire (FFQ) depends on the specific population. The 138-item FFQ used in the 5-year follow-up survey for the Japan Public Health Center-based Prospective Study was initially developed for and validated in rural residents. However, the validity of estimates based on this FFQ for urban residents, whos...

OBJECTIVE To evaluate the validity and reproducibility of a 122-item interviewer administered quantitative FFQ developed to determine food and nutrient intakes of adults in Botswana. DESIGN Relative validity of the FFQ was evaluated by comparing nutrient and food group intakes against four non-consecutive 24 h recalls administered over 12 months. The FFQ was repeated after 1 year to assess re...

With the advent of Internet-based 24-hour recall (24HR) instruments, it is now possible to envision their use in cohort studies investigating the relation between nutrition and disease. Understanding that all dietary assessment instruments are subject to measurement errors and correcting for them under the assumption that the 24HR is unbiased for usual intake, here the authors simultaneously ad...