Design and validation of web and computer-based food frequency questionnaire: a scoping review
Web and computer-based food frequency questionnaire (FFQ) provide a lot of advantages including saving cost, reducing participants burden and improving response quality. However, designing and validating a web or computer-based FFQ for a study can be a challenge. Therefore, this study aims to con...
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| Main Authors: | , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2019
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| Subjects: | |
| Online Access: | http://eprints.unisza.edu.my/2010/1/FH03-FSK-19-34666.pdf http://eprints.unisza.edu.my/2010/ |
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| Summary: | Web and computer-based food frequency questionnaire (FFQ) provide a lot of advantages
including saving cost, reducing participants burden and improving response quality.
However, designing and validating a web or computer-based FFQ for a study can be a
challenge. Therefore, this study aims to conduct a scoping review on the design and
validation of web and computer-based FFQ among adult subjects. An electronic search
was conducted on the PubMed database to identify studies published from 2009 to 2018
that included a web or computer-based FFQ for assessment of dietary intake among
adult population. A pool of 27 articles were examined in-depth to assess the development,
comparison or validation of a web or computer-based FFQ. Most of the studies (55%) were
done in European countries. The number of food/drink items listed in the FFQ ranges from
12 to 270 items and portion size of food was estimated using images, ranging from three
to seven images per food item or a standard portion size using household measurement.
The reference period was usually over a period of one month up to one year. Majority of the
study (78%) focus on intake of all food groups except for several studies that focuses on
specific nutrient or food group namely sodium, fatty acids, vitamin D, calcium, fruits and
vegetables, and beverage intake. There were only three studies that recorded supplement
intake during web or computer-based dietary assessment. Out of 27 studies, a total of 22
carried out validation studies using a variety of reference method such as 24hours diet
recall (24%), food diary/ records (27%), weighed food record (27%), paper version of FFQ
(22%) and biomarker (1%). As a conclusion, a variety of web and computer-based FFQ were
used in research worldwide. Strategies to improve the application of current evidence on
best practices in designing and validating a web or computer-based FFQ have the potential
to improve nutritional epidemiology studies. |
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