Reproducibility and Validity of Food Frequency Questionnaires

Willett, Walter C.; Lenart, Elizabeth

doi:10.1093/acprof:oso/9780199754038.003.0006

Cited by 191 publications

(198 citation statements)

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“…Esse tamanho de amostra atende ao recomendado pela literatura, pois foi demonstrado que estudos de validação com um número de indivíduos maior do que 150 a 200 fornece pouca precisão adicional 12 . Para a seleção dos participantes, divulgou-se a pesquisa por meio de jornais e distribuição de panfletos na Região Metropolitana de Porto Alegre.…”

Section: Métodosunclassified

Reprodutibilidade, validade relativa e calibração de um questionário de frequência alimentar para adultos da Região Metropolitana de Porto Alegre, Rio Grande do Sul, Brasil

et al. 2014

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Este estudo testou reprodutibilidade e validade relativa, e estimou fatores de calibração de um QFA (questionário de frequência alimentar) com 120 itens alimentares, em 128 adultos. Aplicou-se um QFA e três inquéritos recordatórios de 24hs (IR24h). A validade foi testada pelo método de Bland-Altman, correlação intraclasse (CCI), classificação em quartos de ingestão e kappa ponderado. Os fatores de calibração foram estimados por meio de regressão linear, com os valores de ingestão alimentar do IR24h como variável dependente e os valores do QFA como variável independente. O QFA subestimou a ingestão da maioria dos nutrientes em relação ao IR24h. O CCI corrigido para energia e deatenuado variou de 0,19 (zinco) a 0,82 (cálcio). Trinta e sete por cento dos indivíduos foram classificados no mesmo quarto, com valor médio de kappa de 0,28 (zinco: 0,08; cálcio: 0,49). Os maiores fatores de calibração foram 0,48 (cálcio), 0,47 (potássio) e 0,44 (carboidratos), e o menor fator foi 0,10 (retinol). Esse QFA demonstrou validade relativa satisfatória e valores de ingestão de energia e nutrientes calibrados semelhantes ao IR24h.

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Section: Métodosunclassified

Reprodutibilidade, validade relativa e calibração de um questionário de frequência alimentar para adultos da Região Metropolitana de Porto Alegre, Rio Grande do Sul, Brasil

et al. 2014

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“…Moreover, FFQ are one of the least invasive methods and incur low participant burden (13) . Although unable to assess absolute dietary intakes, FFQ are mainly used to categorise and rank individuals either by their usual frequency of consumption or nutrient intake, and, as a standardised dietary assessment methodology, allow for comparison of food and nutrient intake across cultures, populations and countries (13)(14)(15)(16)(17) . FFQ can be self-or interviewer administered, though interviewer administered is preferred to ensure adequate completion, and may take place over the telephone, via mail, on computers and through personal interviews, depending on the needs and funding of the study (1,18) .…”

Section: Ffqmentioning

confidence: 99%

Development and use of FFQ among adults in diverse settings across the globe

Sharma

2011

Proc. Nutr. Soc.

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In nutritional epidemiology, development of valid dietary assessment instruments specific to populations in diverse settings is of paramount importance. Such instruments are essential when trying to characterise dietary patterns and intake, investigate diet-disease associations, inform and evaluate nutrition interventions, assess nutrient-gene interactions, conduct cross-country comparison studies and monitor nutrition transitions. The FFQ is a relatively inexpensive tool for measuring long-term dietary intake for large populations and for allowing researchers to track dietary changes over time. However, FFQ must be population specific to capture the local diet and available foods. Collecting 24-h dietary recalls and utilising community feedback to build the FFQ ensures that a culturally appropriate instrument is developed. This article presents several examples describing FFQ development and utilisation in different settings globally. In the Canadian Arctic, FFQ were developed and utilised to inform and evaluate a communitybased intervention programme, characterise the diet and track dietary changes occurring among Inuit and Inuvialuit, populations experiencing rising rates of chronic disease and likely to be extremely vulnerable to the potential effects of climate change. Another example is an FFQ developed to assess sodium intake and evaluate a sodium reduction trial in a high-risk population in Barbados. An example is provided from Brazil, where an FFQ was developed to assess associations between diet, heterocyclic aromatic amines and colorectal adenoma among Japanese Brazilians and to conduct cross-country comparisons. These and other case studies highlight the diversity in dietary intake between populations and the need for FFQ to be developed to capture this diversity. FFQ: Nutritional epidemiology: Interventions: Multi-ethnic populations Dietary assessment methodologiesIn nutritional epidemiology, a variety of different approaches can be used to measure food and nutrient intakes in individuals and populations. These range from relatively simple techniques such as 24-h dietary recalls, estimated or weighed food records, narrative diet histories and FFQ, to the more complex biochemical approach of measuring static or functional markers of nutrient intake in blood, urine or other biological samples. The selection of a dietary assessment methodology depends on the population under investigation and typically involves a compromise between the desired level of accuracy and organisational or financial constraints (1) . Biochemical markers of nutrient intake, while arguably more objective than other methods, are used infrequently outside of small validation or pilot studies due to their high cost and logistical requirements (2) . Food records and 24-h dietary recalls are expensive and

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“…and to measure the performance of previously tested questionnaires for use in substantially different populations (8) .…”

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confidence: 99%

Validation of a self-administered FFQ in adults in Argentina, Chile and Uruguay

Elorriaga

Irazola²,

Defagó³

et al. 2014

Public Health Nutr.

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Objective: To assess the reproducibility and validity among adults in the Southern Cone of Latin America (Argentina, Chile and Uruguay) of a self-administered FFQ to be used in the CESCAS I Study, an ongoing observational prospective cohort study to detect and follow up CVD and their risk factors, as well as in other epidemiological studies. Design: Relative validity of the FFQ was evaluated by comparing nutrient and selected food group intakes with those from three 24 h recalls (24HR) administered over 6 months. The FFQ was administered at baseline (FFQ1) and again after 3 months (FFQ2). Setting: Primary-care centres in Argentina, Chile and Uruguay. Subjects: Adults (n 147) aged 21-74 years. Results: Reproducibility (FFQ1 v. FFQ2): the intra-class correlation coefficients for nutrients ranged from 0?52 (potassium) to 0?74 (fat). Validity (FFQ1 v. the average of three 24HR): the Pearson correlations for energy-adjusted nutrients ranged from 0?39 (thiamin and cholesterol) to 0?59 (carbohydrate). Joint classification: overall, 66 % of participants in the lowest 24HR quintile were in the lowest one or two FFQ1 quintiles, and 62 % of those in the highest 24HR quintile were in the highest one or two FFQ1 quintiles. On average, only 4 % were misclassified into extreme quintiles. Conclusions: The FFQ version for the Southern Cone seems to present moderate to acceptable relative validity and reliability for its use in the CESCAS I Study to measure dietary exposure.Keywords FFQ Validity Reproducibility Southern Cone of Latin America CVD are increasing throughout the world and cause 16?7 million deaths each year, 80 % of which occur in lowand middle-income countries. Most cardiovascular risk in the Southern Cone of Latin America (Argentina, Chile and Uruguay) could be explained by tobacco use, abnormal lipids, abdominal obesity and high blood pressure, as shown in the INTERHEART Latin American study that included 3125 cases and controls from different Latin American countries (1) . In Argentina, recent estimates have shown that there were more than 600 000 disabilityadjusted life years and almost 400 000 years of potential life lost due to CHD and stroke in 2005. Modifiable risk factors explained 75?0 % of fatal and non-fatal acute CHD and stroke events, 75?5 % of costs for acute events and 70?7 % of disability-adjusted life years lost (2) .Nutritional exposures are considered risk factors for CVD as well as other non-communicable and infectious diseases (3,4) . FFQ are often used in epidemiological studies to investigate the relationship between diet and disease because they are easy to administer, less expensive than other methods and can, at least theoretically, assess dietary intake over an extended period of time (5) . Usually FFQ are not considered an appropriate method of estimating actual nutrient intakes of individuals, but they can be used to rank people according to their intake. This information is useful to categorize nutritional exposures for epidemiological studies (6) .FFQ may be administered by tr...

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Reproducibility and Validity of Food Frequency Questionnaires

Cited by 191 publications

References 0 publications

Reprodutibilidade, validade relativa e calibração de um questionário de frequência alimentar para adultos da Região Metropolitana de Porto Alegre, Rio Grande do Sul, Brasil

Reprodutibilidade, validade relativa e calibração de um questionário de frequência alimentar para adultos da Região Metropolitana de Porto Alegre, Rio Grande do Sul, Brasil

Development and use of FFQ among adults in diverse settings across the globe

Validation of a self-administered FFQ in adults in Argentina, Chile and Uruguay

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