Comparison of weighed food record procedures for the reference methods in two validation studies of food frequency questionnaires (original) (raw)
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https://www.ijhsr.org/IJHSR\_Vol.7\_Issue.9\_Sep2017/IJHSR\_Abstract.038.html, 2017
Food frequency questionnaires (FFQs) have been widely used in various studies assessing dietary intake. Application of technological advancements in FFQs is increasing with the aim of enhancing accuracy and decreasing the respondent and researcher burden. The objective of this review was to explore the validity of various electronic FFQs (eFFQs) as a dietary intake assessment method. A total of 23 studies were finalised for qualitative data analysis after screening of various electronic databases and hand searching. The results showed that most of the eFFQs were self-administered, web-based, used food photographs for food portion size estimation and assessed intake of both macro-and micronutrients. Validity of eFFQs was assessed by comparing nutrient intake with reference methods in terms of association (correlation coefficients) and agreement at group level (paired t-test or Wilcoxon signed rank test). Overall, the association of nutrient intake with the reference method was observed to be acceptable in most studies especially with food records. Only few studies showed good agreement of nutrient intake with the reference method. In case of micronutrients, correlation coefficients >0.20 for all vitamins and minerals were observed in nine studies. The findings highlighted some advantages of eFFQs such as less missing data, convenience, automated data entry and analysis, additional features (audio, photographs, prompts etc.) and less cost than paper. Hence, it can be concluded that eFFQs could be an ideal choice for studies assessing usual dietary intake especially with large sample size and limited resources.
Nutrition and Dietary Supplements, 2021
This study assessed potential differences in estimating short-term dietary intake of energy and nutrients and food consumption, between 4-week food frequency questionnaires (FFQs) and 7-day food records in Romanian adults. Patients and Methods: A total of 116 participants (age range 18-74 years, 31% males and 28.4% of participants being overweight and obese) were recruited. Estimates for energy and macro-and micronutrient intakes, and food group intakes were compared between the two methods using Wilcoxon-sign-rank test, correlation coefficients, Cohen's Kappa, Bland-Altman plots with 95% limits of agreement, and quartile classifications. Results: Cohen's Kappa values for energy and macronutrient intakes indicated moderate agreement, ranging from 0.402 (protein) to 0.470 (fat), fair agreement for most micronutrients (0.2-0.4) and poor agreement for most food groups (<0.2). When data were crossclassified into quartiles for energy and macronutrients, about 58% of participants were cross-classified in the same quartile using both methods, while 33% of participants were cross-classified in adjacent quartiles of one method versus the other. Micronutrients (such Na, Mg, Ca, K, Fe, vitamins) had the highest degree of misclassification, on average 40% being cross-classified in the same quartile and another 40% in adjacent quartiles. Bland-Altman plots suggested that both methods were comparable for energy and all macronutrients. When the consumption of food groups was compared, correlation coefficients between methods ranged from 0.09 (legumes) to 0.26 (whole grain), indicating poor correlation. Conclusion: These results showed that the relative match of a standard FFQ, as compared to the 7-day food records, was moderate in estimating macronutrient and energy, fair for most micronutrient intakes and poor for others and as for food groups.
Validity of a food frequency questionnaire for the determination of individual food intake
The American journal of clinical nutrition, 1984
The validity of a food frequency questionnaire for dietary assessment was tested with 31 college students living and dining in a dormitory. A food frequency questionnaire was mailed to participants requesting them to estimate their usual intake of specific food items. Actual food consumption was determined at each meal with self-report forms. These forms required participants to indicate foods chosen at that meal. To test the validity of the frequency questionnaire, regression equations were calculated for each individual using the frequency questionnaire data as the independent variable (X) and actual intake data as the dependent variable (Y). Eighty-four percent of the r values were greater than 0.50 and 55% were greater than 0.71. All were significant at the 0.002 level or below. As an alternative test of validity, the percentage of over- and underestimation of each food group was also assessed. Foods which are often major components of a meal (eg, flesh foods) were estimated wit...
British Journal of Nutrition, 1994
Women (n 160) aged 50 to 65 years were asked to weigh their food for 4 d on four occasions over the period of 1 year, using the PETRA (Portable Electronic Tape Recorded Automatic) scales. Throughout the year, they were asked to complete seven other dietary assessment methods: a simple 24 h recall, a structured 24 h recall with portion size assessments using photographs, two food-frequency questionnaires, a 7 d estimated record or open-ended food diary, a structured food-frequency (menu) record, and a structured food-frequency (menu) record with portion sizes assessed using photographs. Comparisons between the average of the 16 d weighed records and the first presentation of each method indicated that food-frequency questionnaires were not appreciably better at placing individuals in the distribution of habitual diet than 24 h recalls, due partly to inaccuracies in the estimation of frequency of food consumption. With a 7 d estimated record or open-ended food diary, however, individual values of nutrients were most closely associated with those obtained from 16 d weighed records, and there were no significant differences in average food or nutrient intakes.
Comparison of estimated nutrient intake by two methods: validation of a food frequency questionnaire
Journal of Human Nutrition and Dietetics, 1992
The validity of a quantitative self-administered food frequency questionnaire (FFQ) was tested by comparison with 7-d weighed food records (7DWR). Subjects for the study were 24 females between 20 and 43 years of age (mean=24 years). The main aim of the FFQ was to classify subjects according to their total fat intake. The mean nutrient intakes estimated by the FFQ were consistently and significantly higher than the estimates by the 7DWR. Rank correlations showed that the FFQ was able to rank subjects similarly for total energy intake, fat, alcohol and fibre intake as well as for the percentage contribution of macronutrients to energy intake. Intra-class correlations showed that the two methods did not agree at the individual level for energy and macronutrient intake except alcohol. These results suggest that the FFQ was suitable for ranking the subjects according to their total fat intake but was not suitable for estimating the individual nutrient intake or average nutrient intake of this relatively small group.
Relative validities of 3-day food records and the food frequency questionnaire
Nutrition Research and Practice, 2010
The food frequency questionnaire (FFQ) has been used as an important dietary assessment tool in epidemiologic studies, but the usefulness of the FFQ has been debated in recent years. This study was performed to evaluate the relative validities of 3-day food records and the semi-quantitative FFQ. A total of 124 subjects finished 3-day food records (FRs) during each of the four seasons, as well as the FFQ from December 2002 to May 2004. The FFQ was a food based semi-quantitative FFQ including 103 items. Three-day FRs from each season and a randomly selected season were compared with the remaining 9-day FRs. The remaining 9-day FRs, as a reference measurement, were also compared with the FFQ. Pearson's correlation coefficients between the 3-day FRs and the 9-day FRs were between 0.14 and 0.56. Pearson's correlation coefficients between the FFQ and the 9-day FRs ranged between 0.07 and 0.41. Average proportions of classification into the same quartiles, adjacent quartiles, and distant quartiles between the 3-day FRs and the 9-day FRs were 35.8%, 40.5%, and 5.2%, respectively. On average, the proportions of classification into the same quartiles, adjacent quartiles, and distant quartiles between the FFQ and the 9-day FRs were 31.1%, 39.4%, and 6.9%, respectively. Three-day FRs showed higher correlations and higher agreement proportions of quartile classification with the 9-day FRs than did the FFQ, but both relative validities of 3-day FRs and the FFQ appear to be acceptable as dietary assessment tools. Further studies for validating food intake by reliable biomarkers are necessary.
Development, validation and utilisation of food-frequency questionnaires -a review
Objective: The purpose of this review is to provide guidance on the development, validation and use of food-frequency questionnaires (FFQs) for different study designs. It does not include any recommendations about the most appropriate method for dietary assessment (e.g. food-frequency questionnaire versus weighed record). Methods: A comprehensive search of electronic databases was carried out for publications from 1980 to 1999. Findings from the review were then commented upon and added to by a group of international experts. Results: Recommendations have been developed to aid in the design, validation and use of FFQs. Specific details of each of these areas are discussed in the text. Conclusions: FFQs are being used in a variety of ways and different study designs. There is no gold standard for directly assessing the validity of FFQs. Nevertheless, the outcome of this review should help those wishing to develop or adapt an FFQ to validate it for its intended use. Keywords Food-frequency questionnaire Review Validation Method development q The Authors 2002
The European Journal of Public Health, 2013
Background: The aim of the present study was to assess the relative validity of a self-administered qualitative food frequency questionnaire (FFQ) applied in the Belgian food consumption survey. Methods: Comparison of food consumption data from an FFQ with 7-day estimated diet records (EDR) was made in a sample of 100 participants (aged 15-90 years). The FFQ comprised a total of 50 foods. Both FFQ and EDR foods were categorized into 15 conventional food groups. Results: De-attenuated Spearman rank correlation coefficients between the FFQ and the EDR ranged from À0.16 for potatoes and grains to 0.83 for alcoholic beverages, with a median of 0.40 for all 15 food groups. The proportion of participants classified in the same tertile of intake by the FFQ and EDR ranged from 32% for potatoes and grains to 76% for alcoholic beverages. Extreme classification into opposite tertiles was <10% for milk and soy products, alcoholic beverages, fried restgroup foods and fats. Conclusion: Notwithstanding the short nature and the absence of portion size questions, the FFQ appears to be reasonably valid in both genders and across different age categories for most food groups. However, for the food groups bread and cereals, potatoes and grains, and sauces, estimates should be interpreted with caution because of poor ranking agreement.
The Assessment of Individual Usual Food Intake in Large-Scale Prospective Studies
Annals of Nutrition and Metabolism, 2010
Recent research has called into question the current practice to estimate individual usual food intake in large-scale studies. In such studies, usual food intake has been defined as diet over the past year. The aim of this review is to summarise the concepts of dietary assessment methods providing food intake data over this time period. A conceptualised framework is given to help researchers to understand the more recent developments to improve dietary assessment in large-scale prospective studies, and also to help to spot the gaps that need to be addressed in future methodological research. The conceptual framework illustrates the current options for the assessment of an individual’s food consumption over 1 year. Ideally, a person’s food intake on each day of this year should be assessed. Due to participants’ burden, and organisational and financial constraints, however, the options are limited to directly requesting the long-term average (e.g. food frequency questionnaires), or se...
Development and Validation: of a Food Frequency Questionnaire
Canadian Journal of Dietetic Practice and Research, 2005
Regular diet monitoring requires a tool validated in the target population. A 73-item, semiquantitative, self-administered food frequency questionnaire (FFQ), was adapted in French and English from the Block National Cancer Institute Health Habits and History Questionnaire. The FFQ was used to capture usual long-term food consumption among adults living in Quebec. A representative sample of adults aged 18 to 82 (57% female) was recruited by random digit dialling in the Montreal region. Approximately 64% of recruits completed and returned the instrument by mail (n=248). The FFQ was validated in a subsample (n=94, 61% female) using four nonconsecutive food records (FRs). Median energy intakes (in kcal) for men and women, respectively, were FFQ (total sample) 2,112 and 1,823, FFQ (subsample) 2,137 and 1,752, and FR (subsample) 2,510 and 1,830. Spearman correlation analyses between FFQ and FR nutrients were positive (with r ranging from 0.32 for folate to 0.58 for saturated fatty acids)...