ArticlePublic health nutrition2016
Relative validity of a semi-quantitative, web-based FFQ used in the 'Snart Forældre' cohort - a Danish study of diet and fertility.
Article in Public health nutrition, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 1 of them a synthesis that pooled it.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
29 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Validation of semiquantitative FFQ administered to adults: a systematic review.Public health nutrition · 2021Pooled it
- Trial
- The (ab)use of food frequency questionnaire data in substitution modelling in nutritional epidemiology: a critique.European journal of clinical nutrition · 2026Review
- Agreement between a new web-based and a legacy paper-based food frequency questionnaires in French-speaking Switzerland.Nutrition journal · 2026Article
- Relative Validity and Reproducibility of a Semi-Quantitative Web-Based Food Frequency Questionnaire for Swiss Adults.Nutrients · 2025Article
- Online Version of the Self-Administered Food Frequency Questionnaire for the Iranian Adult Population.Nutrition and metabolic insights · 2025Article
- Article
- Changes in Diet and Physical Activity among 18-65-Year-Olds after the First National COVID-19 Lockdown in Denmark.Nutrients · 2023Article
- Glycemic Load, Dietary Fiber, Added Sugar, and Spontaneous Abortion in Two Preconception Cohorts.The Journal of nutrition · 2023Article
- Organic food consumption and fecundability in a preconception cohort study of Danish couples trying to conceive.Paediatric and perinatal epidemiology · 2023Article
- Reproducibility of the German and Slovakian Versions of the Dietary Habits and Nutrition Beliefs Questionnaire (KomPAN).Nutrients · 2022Article
- A Clustering Approach to Meal-Based Analysis of Dietary Intakes Applied to Population and Individual Data.The Journal of nutrition · 2022Article
- Adherence to Nordic dietary patterns and risk of first-trimester spontaneous abortion.European journal of nutrition · 2022Article
- Protein-rich food intake and risk of spontaneous abortion: a prospective cohort study.European journal of nutrition · 2022Article
- Weekend-Weekday Differences in Adherence to the Mediterranean Diet among Spanish University Students.Nutrients · 2022Observational
- Dietary folate intake and fecundability in two preconception cohorts.Human reproduction (Oxford, England) · 2022Article
- Comparison of dietary intake measured by a web-based FFQ and repeated 24-hour dietary recalls: the Hordaland Health Study.Journal of nutritional science · 2022Article
- The PRIDE Study: Evaluation of online methods of data collection.Paediatric and perinatal epidemiology · 2020Article
- The Association between Seafood Intake and Fecundability: Analysis from Two Prospective Studies.Nutrients · 2020Article
- Glycemic load, dietary fiber, and added sugar and fecundability in 2 preconception cohorts.The American journal of clinical nutrition · 2020Article
Corrections and comments
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Authors and funding
7 authors.
Funding
Abstract
objectiveTo assess the relative validity of a semi-quantitative, web-based FFQ completed by female pregnancy planners in the Danish 'Snart Forældre' study.
designWe validated a web-based FFQ based on the FFQ used in the Danish National Birth Cohort against a 4 d food diary (FD) and assessed the relative validity of intakes of foods and nutrients. We compared means and medians of intakes, and calculated Pearson correlation coefficients and de-attenuated coefficients to assess agreement between the two methods. We also calculated the proportion correctly classified based on the same or adjacent quintile of intake and the proportion of grossly misclassified (extreme quintiles).
settingParticipants (n 128) in the 'Snart Forældre' study who had completed the web-based FFQ were invited to participate in the validation study. SUBJECTS: Participants in the 'Snart Forældre' study, in total ninety-seven women aged 20-42 years.
resultsReported intakes of dairy products, vegetables and potatoes were higher in the FFQ compared with the FD, whereas reported intakes of fruit, meat, sugar and beverages were lower in the FFQ than in the FD. Overall the de-attenuated correlation coefficients were acceptable, ranging from 0·33 for energy to 0·93 for vitamin D. The majority of the women were classified in the same or adjacent quintile and few women were misclassified (extreme quintiles).
conclusionThe web-based FFQ performs well for ranking women of reproductive age according to high or low intake of foods and nutrients and, thus, provides a solid basis for investigating associations between diet and fertility.
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