Vibeke K Knudsen1, Elizabeth E Hatch2, Heidi Cueto3, Katherine L Tucker4, Lauren Wise2, Tue Christensen1, Ellen M Mikkelsen3. 1. 1Division of Nutrition,National Food Institute,Technical University of Denmark,Mørkhøj Bygade 19,2860 Søborg,Denmark. 2. 2Department of Epidemiology,Boston University School of Public Health,Boston,MA,USA. 3. 3Department of Clinical Epidemiology,Aarhus University Hospital,Aarhus,Denmark. 4. 4Department of Clinical Laboratory & Nutritional Sciences,University of Massachusetts Lowell,Lowell,MA,USA.
Abstract
OBJECTIVE: To assess the relative validity of a semi-quantitative, web-based FFQ completed by female pregnancy planners in the Danish 'Snart Forældre' study. DESIGN: We 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). SETTING: Participants (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. RESULTS: Reported 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). CONCLUSION: The 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.
OBJECTIVE: To assess the relative validity of a semi-quantitative, web-based FFQ completed by female pregnancy planners in the Danish 'Snart Forældre' study. DESIGN: We 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). SETTING:Participants (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. RESULTS: Reported 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). CONCLUSION: The 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.
Authors: Kristen A Hahn; Amelia K Wesselink; Lauren A Wise; Ellen M Mikkelsen; Heidi T Cueto; Katherine L Tucker; Marco Vinceti; Kenneth J Rothman; Henrik Toft Sorensen; Elizabeth E Hatch Journal: J Nutr Date: 2019-09-01 Impact factor: 4.798
Authors: Lauren A Wise; Amelia K Wesselink; Katherine L Tucker; Shilpa Saklani; Ellen M Mikkelsen; Heidi Cueto; Anders H Riis; Ellen Trolle; Craig J McKinnon; Kristen A Hahn; Kenneth J Rothman; Henrik Toft Sørensen; Elizabeth E Hatch Journal: Am J Epidemiol Date: 2018-01-01 Impact factor: 4.897
Authors: Lauren A Wise; Amelia K Wesselink; Ellen M Mikkelsen; Heidi Cueto; Kristen A Hahn; Kenneth J Rothman; Katherine L Tucker; Henrik Toft Sørensen; Elizabeth E Hatch Journal: Am J Clin Nutr Date: 2016-11-30 Impact factor: 7.045
Authors: Anne Sofie Dam Laursen; Benjamin Randeris Johannesen; Sydney K Willis; Elizabeth E Hatch; Lauren A Wise; Amelia K Wesselink; Kenneth J Rothman; Henrik Toft Sørensen; Ellen Margrethe Mikkelsen Journal: Eur J Nutr Date: 2022-04-24 Impact factor: 4.865
Authors: Amelia K Wesselink; Elizabeth E Hatch; Ellen M Mikkelsen; Ellen Trolle; Sydney K Willis; Susan E McCann; Liisa Valsta; Annamari Lundqvist; Katherine L Tucker; Kenneth J Rothman; Lauren A Wise Journal: J Nutr Date: 2020-05-01 Impact factor: 4.798
Authors: Sydney K Willis; Lauren A Wise; Amelia K Wesselink; Kenneth J Rothman; Ellen M Mikkelsen; Katherine L Tucker; Ellen Trolle; Elizabeth E Hatch Journal: Am J Clin Nutr Date: 2020-07-01 Impact factor: 7.045
Authors: Heidi T Cueto; Bjarke H Jacobsen; Anne Sofie Dam Laursen; Anders H Riis; Elizabeth E Hatch; Lauren A Wise; Ellen Trolle; Henrik Toft Sørensen; Kenneth J Rothman; Amelia K Wesselink; Sydney Willis; Benjamin R Johannesen; Ellen M Mikkelsen Journal: Hum Reprod Date: 2022-04-01 Impact factor: 6.918
Authors: Amelia K Wesselink; Sydney K Willis; Anne Sofie Dam Laursen; Ellen M Mikkelsen; Tanran R Wang; Ellen Trolle; Katherine L Tucker; Kenneth J Rothman; Lauren A Wise; Elizabeth E Hatch Journal: Eur J Nutr Date: 2022-03-13 Impact factor: 4.865
Authors: Ellen M Mikkelsen; Anders H Riis; Lauren A Wise; Elizabeth E Hatch; Kenneth J Rothman; Heidi T Cueto; Henrik Toft Sørensen Journal: BMJ Date: 2016-08-31