Measuring dietary intake in nursing research (original) (raw)
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DIET@NET: Best Practice Guidelines for dietary assessment in health research
Abstract Background: Dietary assessment is complex, and strategies to select the most appropriate dietary assessment tool (DAT) in epidemiological research are needed. The DIETary Assessment Tool NETwork (DIET@NET) aimed to establish expert consensus on Best Practice Guidelines (BPGs) for dietary assessment using self-report. Methods: The BPGs were developed using the Delphi technique. Two Delphi rounds were conducted. A total of 131 experts were invited, and of these 65 accepted, with 48 completing Delphi round I and 51 completing Delphi round II. In all, a total of 57 experts from North America, Europe, Asia and Australia commented on the 47 suggested guidelines. Results: Forty-three guidelines were generated, grouped into the following four stages: Stage I. Define what is to be measured in terms of dietary intake (what? who? and when?); Stage II. Investigate different types of DATs; Stage III. Evaluate existing tools to select the most appropriate DAT by evaluating published validation studies; Stage IV. Think through the implementation of the chosen DAT and consider sources of potential biases. Conclusions: The Delphi technique consolidated expert views on best practice in assessing dietary intake. The BPGs provide a valuable guide for health researchers to choose the most appropriate dietary assessment method for their studies. These guidelines will be accessible through the Nutritools website, www.nutritools.org.
Validity of dietary patterns to assess nutrient intake adequacy
British Journal of Nutrition, 2009
The purpose of the present study was to conduct a systematic review of the literature on the value of the methods used to assess dietary patterns for measuring nutrient intake adequacy in the population. Systematic review on Pubmed database up to April 2008. The search included specific key words and MeSH terms. No language limit was set. Only studies that compared food patterns with nutrient intake adequacy or nutrient biomarkers were included in the analysis. The search resulted in 1504 articles. The inclusion and exclusion criteria limited the selection to thirty articles. Nineteen studies evaluated the usefulness of the dietary patterns, either a priori defined (thirteen studies), or defined by factor analysis (four studies) or by cluster analysis (two studies), but only nine of them tested their validity (four a priori defined and four a posteriori defined). Diet indices showed moderate to good validity results for measuring the adequacy of intakes for a-carotene, b-carotene, vitamin C, vitamin B 6 , Ca, folic acid, Fe and Mg. The factor analysis approach showed moderate to good validity correlations with the adequacy of intake of a-carotene, b-carotene, lutein, lycopene, vitamin C, vitamin B 6 and folic acid. Vitamin B 12 and vitamin E are the micronutrients with less probability of being adequately assessed with dietary patterns a priori or a posteriori defined. Diet indices are tools with fair to moderate validity to assess micronutrient intake adequacy. van't Veer P, Vucic V, Wijnhoven TMA. * Corresponding author: Lluís Serra-Majem, fax þ 34 93 4034543, email lserra@dcc.ulpgc.es
The validity of dietary assessment in general practice
Journal of Epidemiology & Community Health, 1999
Objective-To validate a range of dietary assessment instruments in general practice. Methods-Using a randomised block design, brief assessment instruments and more complex conventional dietary assessment tools were compared with an accepted "relative" standard-a seven day weighed dietary record. The standard was checked using biomarkers, and by performing test-retest reliability in additional subjects (n=29). Outcomes-Agreement with weighed record. Percentage agreement with weighed record, rank correlation from scatter plot, rank correlation from Bland-Altman plot. Reliability of the weighed record. Setting-Practice nurse treatment room in a single suburban general practice. Subjects-Patients with risk factors for cardiovascular disease (n=61) or age/sex stratified general population group (n=50). Results-Brief self completion dietary assessment tools based on food groups eaten during a week show reasonable agreement with the relative standard. For % energy from fat and saturated fat, nonstarch polysaccharide, grams of fruit and vegetables and starchy foods consumed the range of agreement with the standard was: median % diVerence −6% to 12%, rank correlation 0.5 to 0.6. This agreement is of a similar order to the reliability of the weighed record, as good as or better than test standard agreement for more time consuming instruments, and compares favourably with research instruments validated in other settings. Underreporting of energy intake was common (40%) and more likely if subjects were obese (body mass idex (BMI) >30 60% under-reported; BMI <30 29%, p<0.001). Conclusion-Under-reporting of absolute energy intake is common, particularly among obese patients. Simple self assessment tools based on food groups, designed for practice nurse dietary assessment, show acceptable agreement with a standard, and suggest such tools are sufficiently accurate for clinical work, research, and possibly population dietary monitoring.
Perspectives of Dietary Assessment in Human Health and Disease
Nutrients, 2022
Diet and human health have a complex set of relationships, so it is crucial to identify the cause-effects paths and their management. Diet is crucial for maintaining health (prevention) and unhealthy diets or diet components can cause disease in the long term (non-communicable disease) but also in the short term (foodborne diseases). The present paper aims to provide a synthesis of current research in the field of dietary assessment in health and disease as an introduction to the special issue on “Dietary Assessment and Human Health and Disease”. Dietary assessment, continuously evolving in terms of methodology and tools, provides the core information basis for all the studies where it is necessary to disentangle the relationship between diet and human health and disease. Estimating dietary patterns allows for assessing dietary quality, adequacy, exposure, and environmental impact in nutritional surveillance so on the one hand, providing information for further clinical studies and ...
Biases and adjustments in nutritional assessments from dietary questionnaires
Nutricion hospitalaria, 2015
In nutritional epidemiology, it is essential to use Food Consumption Assessment Methods that have been validated and accepted by the international community for estimating food consumption of individuals and populations. This assessment must be made with the highest quality possible so as to avoid, as far as possible, sources of error and confusion in the processes. The qualities that are required in a measurement method are validity and accuracy; validity being the main factor. Lack of validity produces biases, or systematic errors. These can reside in the process of subject selection, or processes of information gathering where the lack of accuracy produces random errors. For many nutrients, the intra-individual variances are due to many factors such as day-of-the-week or season, and could create problems in the data analyses. Adjustments are needed to minimize these effects. Confounding factors may over- or under-state the real magnitude of the observed association, or even alter...
Dietary Assessment Methods in Surveillance Systems Targeted to Adults: A Literature Review
Food Science & Nutrition Technology, 2024
Accurate and reliable evaluation of dietary consumption is essential for understanding individual dietary profiles. Proper dietary practices should provide sufficient amounts of both macronutrients and micronutrients for leading a healthy life. Choosing the best dietary assessment method for a certain objective leads to greater evidence for effective nutrition projects, policies, and programs. This review provides a clear understanding of dietary diversity assessment methods and the problems associated with choosing the best method. The resource guide aims to improve the quality and accuracy of nutrition information and provides a description of its applications, validity, strengths, and limitations. The databases searched for relevant papers for this review were Science Direct, Google Scholar, PubMed, Hindawi, Web of Science, Cochrane Library, etc. The review focused on collecting data from the last ten years of published articles, and duplicate papers were excluded from the database. Assessment methods described and compared in this study were the 24-hour recall method, food frequency questionnaires (FFQs), food records (FRs), quantitative food frequency questionnaires (QFFQs), non-quantitative food frequency questionnaires (Non-QFFQs), semi-quantitative food frequency questionnaires (SQFFQs), weighed FRs, and estimated FRs. In conclusion, this study highlights the need for a surveillance system for adults that collects comprehensive dietary information using standardized techniques and minimizes bias. This review's extensive information can help national authorities choose appropriate protocols for their own dietary assessment surveys.
British Journal of Nutrition, 2009
In order to assess nutritional adequacy, reliable estimates of nutrient intake are required. Specifically, the EURopean micronutrient RECommendations Aligned (EURRECA) Network of Excellence needs clear guidelines on methods suitable for assessing micronutrient intakes among vulnerable population groups. The objective of this project was to collect, evaluate data and review the suitability of methods used to assess dietary intake of low-income groups across Europe. A comprehensive literature review methodology was employed, which involved structured search MEDLINE, from 1990 to 2008, on (nutrient intake methods) and (validity terms) and (human studies) and finally (low-income terms). In addition, manual searches were conducted for published books and national studies. Seven studies satisfied the selection criteria for inclusion in the review in which four dietary intake methods had been described and validated. Three other studies found in the grey literature used similar methods. Only one study tested a variety of methods to assess reliability and the method preferred by those having low incomes. Preferred methods were 24 h recalls and a FFQ which, compared with the weighed inventory, also yielded higher estimates of energy and nutrient intakes. Many of the methods used in low-income populations have not been subjected to evaluation and consequently may not demonstrate sensitivity and/or specificity when used in this population. Based on one study only, four multiple-pass 24 h recalls are recommended as the most appropriate method for the evaluation of nutritional adequacy in low-income households.
F1000Research, 2017
Self-reported dietary intake is assessed by methods of real-time recording (food diaries and the duplicate portion method) and methods of recall (dietary histories, food frequency questionnaires, and 24-hour dietary recalls). Being less labor intensive, recall methods are more frequently employed in nutritional epidemiological investigations. However, sources of error, which include the participants’ inability to fully and accurately recall their intakes as well as limitations inherent in the food composition databases applied to convert the reported food consumption to energy and nutrient intakes, may limit the validity of the generated information. The use of dietary biomarkers is often recommended to overcome such errors and better capture intra-individual variability in intake; nevertheless, it has its own challenges. To address measurement error associated with dietary questionnaires, large epidemiological investigations often integrate sub-studies for the validation and calibr...
Practical nutrition assessment in primary care settings
American Journal of Preventive Medicine, 2000
Background: Poor dietary and physical activity habits account for 300,000 deaths per year. Interventions in the primary care setting offer promise for effecting change on a broad scale. However, to conduct counseling, primary care providers need quick, accurate, and efficient assessment tools that are practical for a health care setting. Methods: We reviewed 18 dietary measures for use in primary care that were brief (less than 50 items) and easy to administer, score, and interpret. The macronutrients assessed by the measure and the psychometric properties, if given, are reported. Results: In general, reliability and validity coefficients were slightly lower than more detailed instruments (i.e., food frequency questionnaires, diet recall); however, they are acceptable within this clinical setting. Conclusions: Providers can benefit from using these tools to assess current dietary patterns and to guide patient counseling. Future measures should focus on additional nutritional topics (e.g., calcium deficiency) and sensitivity to change over time.
On the Importance of Using Multiple Methods of Dietary Assessment
Epidemiology, 2004
Background-Plasma carotenoid concentrations reflect intake of vegetables and fruits, the major food sources of these compounds. This study compared the ability of 2 measures of dietary intake (24-hour diet recalls and food frequency questionnaires [FFQs]) to corroborate plasma carotenoid concentrations in a subset of women participating in a diet intervention trial. Methods-Plasma carotenoid concentrations and dietary intakes, estimated from 24-hour diet recalls and FFQs, were examined at baseline and 1 year later in a subset of 395 study participants (197 intervention and 198 comparison group). We used longitudinal models to examine associations between estimated intakes and plasma carotenoid concentrations. These analyses were stratified by study group and adjusted for body mass index (BMI), plasma cholesterol concentration, and total energy intake. We conducted simulations to compare mean-squared errors of prediction of each assessment method. Results-In mixed-effects models, the estimated carotenoid intakes from both dietary assessment methods were strongly associated with plasma concentrations of α-carotene, β-carotene, and lutein. Furthermore, modeling the 2 sources of intake information as joint predictors reduced the prediction error.