scholarly journals Reproducibility and validity of the EatWellQ8 web-based food frequency questionnaire against a paper-based food frequency questionnaire and a 4-day weighed food record (Preprint)

2019 ◽  
Author(s):  
Balqees Alawadhi ◽  
Rosalind Fallaize ◽  
Rodrigo Franco ◽  
Faustina Hwang ◽  
Julie Lovegrove
Keyword(s):  
Food Frequency Questionnaire ◽  
Nutrient Intake ◽  
Food Groups ◽  
Food Record ◽  
Nutrient Intakes ◽  
Web Based ◽  
Food Frequency ◽  
Moderate Agreement ◽  
Exact Agreement ◽  
Cross Classification

BACKGROUND The web-based EatWellQ8 food frequency questionnaire (FFQ) was developed as a dietary assessment tool for healthy adults in Kuwait. Validation against reliable instruments and an assessment of its reproducibility are required to ensure its accuracy in computing nutrient intake OBJECTIVE To assess the reproducibility and validity of the EatWellQ8 FFQ against a paper based (PFFQ) and a 4-day weighed food record (WFR). METHODS Reproducibility of the EatWellQ8 FFQ was assessed using test-retest methodology. Participants were required to complete the FFQ at two time points, 4 weeks apart. To assess validity of the EatWellQ8 FFQ, a subset of the participants were asked to complete a PFFQ or a 4-day WFR 1 week after administration of the EatWellQ8 FFQ. The level of agreement between nutrient and food group intakes estimated by repeated EatWellQ8 FFQ and the EatWellQ8 FFQ and the PFFQ and the 4-day WFR were evaluated using Bland-Altman methodology and classification into quartiles of daily intake. Crude unadjusted correlation coefficients were also calculated. RESULTS A total of 99 participants (65% female: 35% male) completed the study, 53 participated in the reproducibility study and the 4-day WFR validity study (mean age 37 years) and a further 46 participated in the PFFQ validity study (mean age 36 years). Crude unadjusted correlations for repeated EatWellQ8 FFQ ranged from (0.37-0.82) (P<0.01). Mean cross-classification into “exact agreement plus adjacent” was 88% for nutrient intakes, 86% for food groups, and Bland-Altman plots showed good agreement for energy-adjusted macronutrient intakes. Agreement between the EatWellQ8 FFQ and PFFQ varied, with crude unadjusted correlations ranging from (0.42-0.73) (P<0.05). Mean cross-classification into “exact agreement plus adjacent” was 84% for nutrient intake and 74% for food groups. Bland-Altman plots showed moderate agreement for both energy and energy-controlled nutrient intakes. Crude unadjusted correlations for the EatWellQ8 FFQ and the 4-day WFR ranged from (0.40-0.88) (P<0.01). Mean cross-classification into “exact agreement plus adjacent” was 85% for nutrient intake and 83% for food groups. Bland-Altman plots showed moderate agreement for energy-adjusted macronutrient intakes. CONCLUSIONS Results indicate that the web-based EatWellQ8 FFQ is reproducible for assessing nutrient and food group intake and has moderate agreement compared to a PFFQ and a 4-day WFR for measuring energy and nutrient intakes.

scholarly journals Validation of a Food Frequency Questionnaire Based on Food Groups for Estimating Individual Nutrient Intake.

2001 ◽  
Vol 59 (5) ◽  
pp. 221-232 ◽  
Author(s):  
Keiko Takahashi ◽  
Yukio Yoshimura ◽  
Tae Kaimoto ◽  
Daisuke Kunii ◽  
Tatsushi Komatsu ◽  
...  
Keyword(s):  
Food Frequency Questionnaire ◽  
Nutrient Intake ◽  
Food Groups ◽  
Food Frequency

scholarly journals Development and Validation of a Data-Based Food Frequency Questionnaire for Adults in Eastern Rural Area of Rwanda

2016 ◽  
Vol 9 ◽  
pp. NMI.S38374 ◽  
Author(s):  
Ayumi Yanagisawa ◽  
Noriko Sudo ◽  
Yukiko Amitani ◽  
Yuko Caballero ◽  
Makiko Sekiyama ◽  
...  
Keyword(s):  
Vitamin A ◽  
Rural Area ◽  
Food Frequency Questionnaire ◽  
Correlation Coefficients ◽  
Nutrient Intakes ◽  
Food Frequency ◽  
Food Records ◽  
Percent Contribution ◽  
Cross Classification ◽  
Development And Validation

This study aimed to develop and evaluate the validity of a food frequency questionnaire (FFQ) for rural Rwandans. Since our FFQ was developed to assess malnutrition, it measured energy, protein, vitamin A, and iron intakes only. We collected 260 weighed food records (WFRs) from a total of 162 Rwandans. Based on the WFR data, we developed a tentative FFQ and examined the food list by percent contribution to energy and nutrient intakes. To assess the validity, nutrient intakes estimated from the FFQ were compared with those calculated from three-day WFRs by correlation coefficient and cross-classification for 17 adults. Cumulative contributions of the 18-item FFQ to the total intakes of energy and nutrients reached nearly 100%. Crude and energy-adjusted correlation coefficients ranged from -0.09 (vitamin A) to 0.58 (protein) and from -0.19 (vitamin A) to 0.68 (iron), respectively. About 50%-60% of the participants were classified into the same tertile. Our FFQ provided acceptable validity for energy and iron intakes and could rank Rwandan adults in eastern rural area correctly according to their energy and iron intakes.

Validation of a Quantitative Food Frequency Questionnaire for a Japanese Population in Hawaii

2019 ◽  
Vol 89 (3-4) ◽  
pp. 200-209
Author(s):  
Mohammadreza Pakseresht ◽  
Maj Earle ◽  
Fariba Kolahdooz ◽  
Loïc Le Marchand ◽  
Sangita Sharma
Keyword(s):  
Vitamin D ◽  
Food Frequency Questionnaire ◽  
Dietary Fibre ◽  
Saturated Fatty Acids ◽  
Kappa Statistics ◽  
Japanese American ◽  
Food Record ◽  
Cross Sectional ◽  
Food Frequency ◽  
Cross Classification

Abstract. Objective: To measure the validity of a quantitative food frequency questionnaire (QFFQ). Design : A cross-sectional validation study of the QFFQ against a four-day food record (4DR) using Spearman correlation, cross-classification, kappa statistics, and Bland–Altman plotting. Setting : The Gastroenterology Department of Kaiser Permanente Hawaii. Subjects: 76 healthy Japanese American men and women, aged 40–75 years. Results : Somewhat stronger average correlations were observed between the QFFQ and the 4DR for macronutrients compared to micronutrients (Spearman rho of 0.47 vs. 0.35). Moderate correlations between the two tools were observed for macronutrients (including saturated fatty acids and dietary fibre), iron, β-carotene, vitamin C, and ethanol ( rho: 0.38–0.58). Overall, stronger correlations were found among men than women between the two tools (mean rho 0.41 vs. 0.26). In a cross classification analysis, for more than 75% of the observations, a complete to relative agreement between the two methods was observed for fat, α-carotene, folate, vitamin D, and ethanol. Sex difference in agreement was minimal in cross-classification (overall extreme misclassification of 9.80% for men and 12.40% for women). Bland–Altman plots showed over-estimations of dietary fibre and α-carotene intake and an under-estimation of cholesterol intake by the QFFQ at high levels of consumption. However, the QFFQ estimation for fat, dietary fibre, folate, cholesterol, α-carotene, vitamins D and C, and ethanol intake was less than 7% different compared to the 4DR. Conclusions: The QFFQ has an adequate validity for fat, folate, vitamin D, and ethanol and can correctly categorize participants for intakes of cholesterol, dietary fibre, α-carotene, and zinc.

scholarly journals Nutritional methods in the European Prospective Investigation of Cancer in Norfolk

2001 ◽  
Vol 4 (3) ◽  
pp. 847-858 ◽  
Author(s):  
Sheila A Bingham ◽  
Ailsa A Welch ◽  
Alison McTaggart ◽  
Angela A Mulligan ◽  
Shirley A Runswick ◽  
...  
Keyword(s):  
Vitamin C ◽  
Dietary Intake ◽  
Food Frequency Questionnaire ◽  
Nutrient Intake ◽  
Plasma Vitamin ◽  
Nutrient Intakes ◽  
Food Frequency ◽  
Men And Women ◽  
Food And Nutrient Intake ◽  
The Uk

AbstractObjective:To describe methods and dietary habits of a large population cohort.Design:Prospective assessment of diet using diet diaries and food-frequency questionnaires, and biomarkers of diet in 24-h urine collections and blood samples.Setting:Free living individuals aged 45 to 75 years living in Norfolk, UK.Subjects:Food and nutrient intake from a food-frequency questionnaire on 23 003 men and women, and from a 7-day diet diary from 2117 men and women. Nitrogen, sodium and potassium excretion was obtained from single 24-h urine samples from 300 individuals in the EPIC cohort. Plasma vitamin C was measured for 20 846 men and women.Results:The food-frequency questionnaire (FFQ) and the food diary were able to determine differences in foods and nutrients between the sexes and were reliable as judged by repeated administrations of each method. Plasma vitamin C was significantly higher in women than men. There were significant (P<0.001) differences in mean intake of all nutrients measured by the two different methods in women but less so in men. The questionnaire overestimated dairy products and vegetables in both men and women when compared with intakes derived from the diary, but underestimated cereal and meat intake in men. There were some consistent trends with age in food and nutrient intakes assessed by both methods, particularly in men. Correlation coefficients between dietary intake assessed from the diary and excretion of nitrogen and potassium in a single 24-h urine sample ranged from 0.36 to 0.47. Those comparing urine excretion and intake assessed from the FFQ were 0.09 to 0.26. The correlations between plasma vitamin C and dietary intake from the first FFQ, 24-h recall or diary were 0.28, 0.35 and 0.40.Conclusions:EPIC Norfolk is one of the largest epidemiological studies of nutrition in the UK and the largest on which plasma vitamin C has been obtained. Methods for obtaining food and nutrient intake are described in detail. The results shown here for food and nutrient intakes can be compared with results from other population studies utilising different methods of assessing dietary intake. The utility of different methods used in different settings within the main EPIC cohort is described. The FFQ is to be used particularly in pooled analyses of risk from diet in relation to cancer incidence within the larger European EPIC study, where measurement error is more likely to be overcome by large dietary heterogeneity on an international basis. Findings in the UK, where dietary variation between individuals is smaller and hence the need to use a more accurate individual method greater, will be derived from the 7-day diary information on a nested case–control basis. 24-h recalls can be used in the event that diary information should not be forthcoming from some eventual cases. Combinations of results utilising all dietary methods and biomarkers may also be possible.

scholarly journals Validity and reproducibility of the food-frequency questionnaire used in the Shanghai Men's Health Study

2007 ◽  
Vol 97 (5) ◽  
pp. 993-1000 ◽  
Author(s):  
Raquel Villegas ◽  
Gong Yang ◽  
DaKe Liu ◽  
Yong-Bing Xiang ◽  
Hui Cai ◽  
...  
Keyword(s):  
Food Frequency Questionnaire ◽  
Correlation Coefficients ◽  
Food Group ◽  
Men’S Health ◽  
Health Study ◽  
Men's Health ◽  
Food Groups ◽  
Food Frequency ◽  
Exact Agreement ◽  
Usual Intake

We evaluated the validity and reproducibility of the FFQ used in the Shanghai Men's Health Study (SMHS). The study included 195 randomly selected participants of the SMHS who completed one FFQ at baseline, twelve 24-hour dietary recalls (24-HDR) (once a month for twelve consecutive months) and a second FFQ at the end of the study. The FFQ accounted for 88·78 % of the foods recorded in the 24-HDR surveys. The validity of the FFQ was evaluated by comparing nutrient and food group intake levels from the second FFQ and the multiple 24-HDR. Correlation coefficients ranged from 0·38 to 0·64 for macronutrients, 0·33 to 0·58 for micronutrients and 0·35 to 0·72 for food groups. Misclassification to opposite quartiles for nutrients and food groups was rare, ranging from 1·5 to 7·7 %, while exact agreement rates were between 31·8 and 53·3 %. The reliability of the FFQ was assessed by comparing the intake levels from the two FFQ. Correlation coefficients were 0·39 to 0·53 for macronutrients, 0·38 to 0·52 for micronutrients and 0·39 to 0·64 for food groups. Exact agreement rates for quartile distribution were between 31·8 and 49·2 %, while misclassification to opposite quartiles was between 1·5 and 6·2 %. These data indicate that the SMHS FFQ can reasonably categorise usual intake of nutrients and food groups among men living in urban Shanghai.

scholarly journals Development and validation of food frequency questionnaire for food and nutrient intakes of adults in Butajira, Southern Ethiopia

2021 ◽  
Vol 10 ◽  
Author(s):  
Ilili F. Regassa ◽  
Bilal S. Endris ◽  
Esete Habtemariam ◽  
Hamid Y. Hassen ◽  
Seifu H. Ghebreyesus
Keyword(s):  
Food Frequency Questionnaire ◽  
Vitamin B1 ◽  
Rank Test ◽  
Southern Ethiopia ◽  
Food Groups ◽  
Nutrient Intakes ◽  
Culturally Specific ◽  
Food Frequency ◽  
Significant Difference ◽  
Total Fat

Abstract We developed a culturally-specific Food Frequency Questionnaire (FFQ) to the Ethiopian context and evaluate its validity in comparison to two 24-h dietary recalls (24-HRs) of food and nutrient intake. To evaluate the validity of a culturally-specific FFQ against two 24-HRs, we used a paired t-test, Wilcoxon-signed-rank test, Correlation coefficients, cross-classification, κ and Bland-Altman analysis. The FFQ was obtained 15 d after the second 24-HR was completed. A total of 105 adults, of which 43 (41 %) were men and 62 (59 %) women, aged 20–65 years participated in this present study. Mean energy and macronutrient intake obtained from the FFQ were significantly higher than those obtained from the mean of two 24-HRs. For energy and nutrient intakes, the crude correlation ranged from 0⋅05 (total fat) to 0⋅49 (vitamin B1). The de-attenuated correlation ranged from to 0⋅10 (total fat) to 0⋅80 (vitamin A). For the majority of food groups, no significant difference was observed in the median intake of food and nutrients. Crude correlation for food groups ranged from 0⋅12 (egg) to 0⋅78 (legumes). The de-attenuated correlation ranged from 0⋅24 (egg) to 1⋅00 (meat/poultry/fish and dairy). The FFQ is valid to assess and rank individuals in terms of intake of most food groups according to high and low intake categories.

Validation of a Food Frequency Questionnaire for Bone Nutrients in Pregnant Women

2016 ◽  
Vol 77 (3) ◽  
pp. 133-139 ◽  
Author(s):  
Maude Perreault ◽  
Victoria Y. Y. Xu ◽  
Suzanne Hamilton ◽  
Deslyn Wright ◽  
Warren Foster ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Vitamin K ◽  
Food Frequency Questionnaire ◽  
Dietary Vitamin ◽  
Food Record ◽  
Third Trimester ◽  
Nutrient Analysis ◽  
High Positive Correlation ◽  
Food Frequency ◽  
Cross Classification

Purpose: The aim was to validate a food frequency questionnaire (FFQ) against a 3-day food record (3DFR) for pregnant women with a focus on nutrients important for bone health from food and supplements. Methods: The FFQ and 3DFR were administered to pregnant women (n = 42) aged 18–45 years in their third trimester of pregnancy in Hamilton, Ontario. Nutrient analysis of intakes was conducted using an FFQ calculator and Nutritionist-Pro software. The average daily serving consumption of Milk and alternatives group and Vegetable subgroup from Canada’s Food Guide were also compared. Results: There was a high positive correlation between methods for total dietary vitamin D (r = 0.83). Low positive associations were observed for total protein (r = 0.37), calcium (r = 0.36), vitamin K (r = 0.41), and servings of Milk and alternatives (r = 0.36). A cross-classification analysis using participants’ intake quartiles revealed no major misclassifications. Bland–Altman analysis showed that the FFQ mildly underestimated the intake for protein, whereas it grossly overestimated the intake of vitamin K, and daily servings of Milk and alternatives and Vegetable. Conclusions: This FFQ can serve as a useful tool in clinical and research settings to assess key bone nutrients from foods and supplement sources in pregnant women.

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