OBJECTIVE: To evaluate the validity of the Inter99 food frequency questionnaire (FFQ) compared with a 28-days' diet history and biomarkers. SUBJECTS: A random sample of 13 016 individuals were drawn from a general population and invited for a health screening programme. Participation rate was 52.5%. All high-risk individuals were re-invited for assessment after 1 and 3 years and completed a 198-item FFQ at all three occasions. Participants attending for 3 years follow-up were invited to participate in the validation study, including a 28-days' diet history, a 24-h urine collection and a fasting blood sample. Overall, 264 subjects participated. RESULTS: Spearman's rank correlation coefficients between the two dietary methods ranged from 0.31(beta-carotene) to 0.64 (fruits) in men and from 0.31 (polyunsaturated fat and sodium) to 0.64 (fruits) for women. The proportion of individuals classified in the same or adjacent quintiles were, on average, 72% for men and 69% for women. Gross misclassification was found on average in 2%. The correlation coefficients of the residuals ranged from 0.27 (sodium) to 0.61 (fruits) for men and from 0.21 (sodium) to 0.62 (B12-vitamin) for women. Correlation coefficients between fruit and vegetable intake and carotenoids ranged from -0.08 (lycopene) to 0.44 (alpha-carotene). For the residuals the correlation coefficients ranged from -0.004 (lycopene) to 0.47 (alpha-carotene). CONCLUSION: The Inter99 FFQ and the residuals of the intake provide acceptable classification of individuals according to their dietary intakes and the FFQ gives a good quantitative measurement of key dietary components.
OBJECTIVE: To evaluate the validity of the Inter99 food frequency questionnaire (FFQ) compared with a 28-days' diet history and biomarkers. SUBJECTS: A random sample of 13 016 individuals were drawn from a general population and invited for a health screening programme. Participation rate was 52.5%. All high-risk individuals were re-invited for assessment after 1 and 3 years and completed a 198-item FFQ at all three occasions. Participants attending for 3 years follow-up were invited to participate in the validation study, including a 28-days' diet history, a 24-h urine collection and a fasting blood sample. Overall, 264 subjects participated. RESULTS: Spearman's rank correlation coefficients between the two dietary methods ranged from 0.31(beta-carotene) to 0.64 (fruits) in men and from 0.31 (polyunsaturated fat and sodium) to 0.64 (fruits) for women. The proportion of individuals classified in the same or adjacent quintiles were, on average, 72% for men and 69% for women. Gross misclassification was found on average in 2%. The correlation coefficients of the residuals ranged from 0.27 (sodium) to 0.61 (fruits) for men and from 0.21 (sodium) to 0.62 (B12-vitamin) for women. Correlation coefficients between fruit and vegetable intake and carotenoids ranged from -0.08 (lycopene) to 0.44 (alpha-carotene). For the residuals the correlation coefficients ranged from -0.004 (lycopene) to 0.47 (alpha-carotene). CONCLUSION: The Inter99 FFQ and the residuals of the intake provide acceptable classification of individuals according to their dietary intakes and the FFQ gives a good quantitative measurement of key dietary components.
Authors: L T Møllehave; T Skaaby; K S Simonsen; B H Thuesen; E L Mortensen; C H Sandholt; O Pedersen; N Grarup; T Hansen; A Linneberg Journal: Eur J Clin Nutr Date: 2017-06-28 Impact factor: 4.016
Authors: Hassan S Dashti; Jack L Follis; Caren E Smith; Toshiko Tanaka; Brian E Cade; Daniel J Gottlieb; Adela Hruby; Paul F Jacques; Stefania Lamon-Fava; Kris Richardson; Richa Saxena; Frank A J L Scheer; Leena Kovanen; Traci M Bartz; Mia-Maria Perälä; Anna Jonsson; Alexis C Frazier-Wood; Ioanna-Panagiota Kalafati; Vera Mikkilä; Timo Partonen; Rozenn N Lemaitre; Jari Lahti; Dena G Hernandez; Ulla Toft; W Craig Johnson; Stavroula Kanoni; Olli T Raitakari; Markus Perola; Bruce M Psaty; Luigi Ferrucci; Niels Grarup; Heather M Highland; Loukianos Rallidis; Mika Kähönen; Aki S Havulinna; David S Siscovick; Katri Räikkönen; Torben Jørgensen; Jerome I Rotter; Panos Deloukas; Jorma S A Viikari; Dariush Mozaffarian; Allan Linneberg; Ilkka Seppälä; Torben Hansen; Veikko Salomaa; Sina A Gharib; Johan G Eriksson; Stefania Bandinelli; Oluf Pedersen; Stephen S Rich; George Dedoussis; Terho Lehtimäki; José M Ordovás Journal: Am J Clin Nutr Date: 2014-11-26 Impact factor: 7.045
Authors: Karen Jaceldo-Siegl; Jing Fan; Joan Sabaté; Synnove F Knutsen; Ella Haddad; W Lawrence Beeson; R Patti Herring; Terrence L Butler; Hannelore Bennett; Gary E Fraser Journal: Public Health Nutr Date: 2011-05-06 Impact factor: 4.022