Validity and reproducibility of a web-based, self-administered food frequency questionnaire
| Autor: | Lisa Baril-Gravel, Marie-Michelle Royer, Audrey Cyr, Marie-Ève Labonté, Benoît Lamarche |
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| Rok vydání: | 2011 |
| Předmět: |
Adult
Male Validation study medicine.medical_specialty education MEDLINE Medicine (miscellaneous) Diet Records Diet Surveys Young Adult Surveys and Questionnaires Web application Medicine Humans Reproducibility Internet Nutrition and Dietetics business.industry digestive oral and skin physiology Food frequency questionnaire Reproducibility of Results Middle Aged Diet Self-Administered Physical therapy Female business Energy Intake |
| Zdroj: | European journal of clinical nutrition. 66(2) |
| ISSN: | 1476-5640 |
| Popis: | To assess the validity and the reproducibility of a newly developed web-based, self-administered food frequency questionnaire (web-FFQ).A total of 74 healthy subjects (34 men and 40 women) from the Québec City metropolitan area were asked to complete, in random order, the web-FFQ, a validated interviewer-administered FFQ (IA-FFQ) and a 3-day food record (3-day FR).Mean intakes of 17/22 nutrients assessed between the web-FFQ and the 3-day FR were not significantly different (differences10%, P≥0.11). Sex and energy-adjusted de-attenuated Pearson correlation coefficients for each nutrient varied from 0.12-0.98 (mean R=0.55, 95% confidence interval 0.46; 0.63) between the web-FFQ and the 3-day FR. All correlations were significant (P≤0.01) and above 0.34 (mean R=0.59, 95% confidence interval 0.54; 0.65) between the web-FFQ and the IA-FFQ, except for sodium (R=0.17, P=0.14). Cross-classification analysis revealed that on average, 77% of subjects were classified in the same or adjacent quartile of nutrient intake between the web-FFQ and the 3-day FR. Correlation coefficients for reproducibility of the web-FFQ tested 4-6 weeks apart in the same individuals were all equal or above 0.48 (P≤0.0001; mean R=0.72, 95% confidence interval 0.68; 0.76). More than 90% of the subjects were classified in the same or adjacent quartile between the two administrations of the web-FFQ, while only 0.8% was misclassified.These data demonstrate that the newly developed web-based FFQ appears to have reasonable validity and good reproducibility for assessing nutrient intakes at the group and individual levels in a population of healthy adults. |
| Databáze: | OpenAIRE |
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