OBJECTIVE: To assess the validity and reliability of the most recent adaptation of Block's full-diet food-frequency questionnaire (FFQ) among a sample of Canadian women. DESIGN: Participants completed a self-administered FFQ (FFQ1), two unannounced 24-hour recalls (weekday and weekend) and a second FFQ (FFQ2) between October 2003 and February 2004. FFQs and recalls were analysed for 32 nutrients using Block Dietary Data Systems and the University of Minnesota's Nutrient Data System. Mean and median intakes were computed, along with crude and deattenuated Pearson correlation coefficients between FFQ1 and the average of two recalls (validity) and between FFQ1 and FFQ2 (reliability). SETTING: Ontario, Canada. SUBJECTS: A random population-based sample (n = 166) of women aged 25 to 74 years. RESULTS: One hundred and fifteen (69%) women completed FFQ1, 96 completed FFQ1 and both recalls, and 93 completed both FFQs, about 56 days apart. Mean intakes were similar for most nutrients. FFQ reliability was high, with Pearson correlation coefficients having a median of 0.75, ranging from 0.57 to 0.90 (macronutrients) and from 0.65 to 0.88 (micronutrients from supplements and food). FFQ validity was moderate to high, with deattenuated Pearson correlation coefficients having a median of 0.59, ranging from 0.11 to 0.73 (macronutrients) and from 0.50 to 0.76 (micronutrients from supplements and food). Our micronutrient correlations were similar to or higher than those of other studies that included supplements. Two correlations <0.40 were associated with fats. CONCLUSIONS: The validity and reliability of this full-diet version of the Block FFQ were moderate to high, supporting its use in future studies among Canadian women.
OBJECTIVE: To assess the validity and reliability of the most recent adaptation of Block's full-diet food-frequency questionnaire (FFQ) among a sample of Canadian women. DESIGN:Participants completed a self-administered FFQ (FFQ1), two unannounced 24-hour recalls (weekday and weekend) and a second FFQ (FFQ2) between October 2003 and February 2004. FFQs and recalls were analysed for 32 nutrients using Block Dietary Data Systems and the University of Minnesota's Nutrient Data System. Mean and median intakes were computed, along with crude and deattenuated Pearson correlation coefficients between FFQ1 and the average of two recalls (validity) and between FFQ1 and FFQ2 (reliability). SETTING: Ontario, Canada. SUBJECTS: A random population-based sample (n = 166) of women aged 25 to 74 years. RESULTS: One hundred and fifteen (69%) women completed FFQ1, 96 completed FFQ1 and both recalls, and 93 completed both FFQs, about 56 days apart. Mean intakes were similar for most nutrients. FFQ reliability was high, with Pearson correlation coefficients having a median of 0.75, ranging from 0.57 to 0.90 (macronutrients) and from 0.65 to 0.88 (micronutrients from supplements and food). FFQ validity was moderate to high, with deattenuated Pearson correlation coefficients having a median of 0.59, ranging from 0.11 to 0.73 (macronutrients) and from 0.50 to 0.76 (micronutrients from supplements and food). Our micronutrient correlations were similar to or higher than those of other studies that included supplements. Two correlations <0.40 were associated with fats. CONCLUSIONS: The validity and reliability of this full-diet version of the Block FFQ were moderate to high, supporting its use in future studies among Canadian women.
Authors: Carlo Selmi; Patrick S C Leung; Laura Fischer; Bruce German; Chen-Yen Yang; Thomas P Kenny; Gerry R Cysewski; M Eric Gershwin Journal: Cell Mol Immunol Date: 2011-01-31 Impact factor: 11.530
Authors: Amanda M Fretts; Barbara V Howard; Barbara McKnight; Glen E Duncan; Shirley A A Beresford; Mihriye Mete; Sigal Eilat-Adar; Ying Zhang; David S Siscovick Journal: Am J Clin Nutr Date: 2012-01-25 Impact factor: 7.045
Authors: Pao-Hwa Lin; William S Yancy; Kathryn I Pollak; Rowena J Dolor; Jennifer Marcello; Gregory P Samsa; Bryan C Batch; Laura P Svetkey Journal: J Acad Nutr Diet Date: 2013-08-30 Impact factor: 4.910
Authors: Donna L White; Peter A Richardson; Mukhtar Al-Saadi; Stephanie J Fitzgerald; Linda Green; Chami Amaratunge; Manvir Anand; Hashem B El-Serag Journal: Dig Dis Sci Date: 2010-12-28 Impact factor: 3.199
Authors: L Langsetmo; A Johnson; R T Demmer; N Fino; E S Orwoll; K E Ensrud; A R Hoffman; J A Cauley; A Shmagel; K Meyer; J M Shikany Journal: J Nutr Health Aging Date: 2019 Impact factor: 4.075
Authors: Jinying Zhao; Mary J Roman; Richard B Devereux; Fawn Yeh; Ying Zhang; Karin Haack; Lyle G Best; Shelley A Cole; Elisa T Lee; Barbara V Howard Journal: Atherosclerosis Date: 2014-01-10 Impact factor: 5.162