Source of variance in 24-hour dietary recall data: implications for nutrition study design and interpretation. Carbohydrate sources, vitamins, and minerals

Milner, Joseph; McGuire, Valerie; Feather, T.; Little, J. A.

doi:10.1093/ajcn/37.6.986

Cited by 337 publications

(204 citation statements)

References 12 publications

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“…This is in agreement with the results of previous studies conducted in Western populations (Beaton et al, Rush & Kristal, 1982;Todd et al, 1983;Beaton et al, 1983;Hunt et al, 1983;Sempos et al, 1985;Tangney et al, 1987;McAvay & Rodin, 1988;Nelson et al, 1989;Hartman et al, 1990;Neuhaus et al, 1991;Wassertheil-Smoller et al, 1993). Nutrients contained largely in foods consumed on a daily basis would show lower intraindividual variation than nutrients found mainly in foods eaten infrequently.…”

Section: Inter-and Intrapopulation Dietary Variation Y Tsubono Et Alsupporting

confidence: 92%

“…A number of studies have examined the relative contributions of several sources of variation in dietary data (Liu et al, 1978;Beaton et al, 1979;Rush & Kristal, 1982;McGee et al, 1982;Todd et al, 1983;Beaton et al, 1983;Hunt et al, 1983;Sempos et al, 1985;Tangney et al, 1987;McAvay & Rodin, 1988;Nelson et al, 1989;Hartman et al, 1990;Neuhaus et al, 1991;Wassertheil-Smoller et al, 1993). These investigations have generally compared the intra-and interindividual variations within a population, but no studies have reported the relative contribution of within-population and between-population variance to total variability between populations.…”

Section: Introductionmentioning

confidence: 99%

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Interpopulation and intrapopulation variability of nutrient intake in five regions of Japan

et al. 1998

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Objectives: To determine the extent to which interpopulation (between-population) variance, relative to intrapopulation (within-population) variance, contribute to the total variability in nutrient intakes. Design: Cross-sectional study. Setting: Five Public Health Center districts in Japan. Subjects: Two hundred and seven men and 183 spouses. Interventions: A three-day weighed food record. Main outcome measures: The total variance in the consumption of 17 nutrient variables was partitioned by analysis of variance into its inter-and intrapopulation components separately for men and women. Results: The percentage contribution of the interpopulation to total variance differed according to the nutrient; it was notable (8±17%) for total energy, carbohydrates, phosphorus, and sodium in both men and women, but was negligible (less than 4%) for micronutrients such as retinol, carotene, thiamin, ribo¯avin, niacin and ascorbic acid. The ratio of intra-to interpopulation variance was estimated for 31 nutrients (17 in men and 14 in women). The point estimates of the ratio were larger than unity in all nutrients, and the lower limit of the 95% con®dence intervals exceeded unity for all but 5 nutrients. Of the two sources of intrapopulation variation, intraindividual variance was larger than interindividual variance in most of the nutrient. Conclusions: The relative magnitude of interpopulation variation in dietary data can be used to quantify the range of exposure in ecological studies and to examine the heterogeneity of populations pooled for individualbased analysis.

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Section: Inter-and Intrapopulation Dietary Variation Y Tsubono Et Alsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Interpopulation and intrapopulation variability of nutrient intake in five regions of Japan

et al. 1998

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“…In many of the studies reviewed methods were inadequate to classify individuals with any precision within the population distribution of true (habitual) intake, due to the large day-to-day variation within person in dietary consumption including magnesium. [15][16][17][18][19] High intra-individual variation can attenuate the absolute values of regression and correlation coefficients. 20 Thus, any potential association between magnesium intake and BP would tend to be underestimated with bias in the estimates of the regression of correlation coefficient toward a zero value (regression dilution).…”

Section: Discussionmentioning

confidence: 99%

Dietary magnesium intake and blood pressure: a qualitative overview of the observational studies

Mizushima

Cappuccio

Nichols³

et al. 1998

J Hum Hypertens

120

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Published reports of 30 separate sets of analyses from 29 observational studies relating dietary intake of magnesium to blood pressure (BP) were identified through a comprehensive search using MEDLINE and BIDS-EMBASE. Three studies were prospective, 24 crosssectional (25 reports), of which four also contained a longitudinal component, and two were obtained from baseline data in a trial. Various dietary methodologies were used: 24-h dietary recall (n = 12), food-frequency questionnaire (8), food record (7), and duplicate diet (2). Twelve reports compared magnesium intake or BP level between subgroups. Seven showed a negative association between magnesium intake and BP level, and five reported no association. From 18 of the 30 sets of analyses either a regression estimate or a Pearson correlation coefficient was reported. Many reports also allowed identification of subgroups by sex, age and race. Ninety population samples and subgroups could

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“…These were shown to be non-adjusted and adjusted for energy, according to the residual method proposed by Willett and Stampfer (1986). Taking into account the within-person variability present in the food intake quantified by the 4 days of 24 h dietary recalls, the within-and between-person variation components were determined, in order to 'de-attenuate' the coefficients of Pearson's correlation (Liu et al, 1978;Beaton et al, 1979Beaton et al, , 1983. For interpretation of correlation coefficients, the range from 0.4 to 0.7 was considered (Willett, 1998) as the acceptable reference for relative method validation.…”

Section: Statistical Analysesmentioning

confidence: 99%

“…In the same way, the food intake variation has been studied by several authors (Liu et al, 1978;Beaton et al, 1979Beaton et al, , 1983Sempos et al, 1985;Basiotis et al, 1987;Nelson et al, 1997b;Willett, 1998), providing a better analysis of the estimates found in their components.…”

Section: Introductionmentioning

confidence: 99%

The influence of education in the validation process of a food frequency questionnaire for adults in Viçosa, Minas Gerais, Brazil

et al. 2006

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Objective: To evaluate the educational influence in the relative validation of a semiquantitative food frequency questionnaire (FFQs) for adults in the city of Viçosa, Brazil. Design and subjects: Four 24-h dietary recalls (reference method) were applied to a sample of 94 adults of both genders, at intervals of 1 month. At the end of the study, an FFQs consisting of 58 food items was also applied. Then, the individuals were divided into two main groups according to their educational level (lower and higher). The dietary data were calculated by the Diet Pro 4.0 software and analyzed according to differences of means or medians and Pearson's correlation coefficients. These coefficients were adjusted by the energy and corrected by the within-person variance for each educational group, considering the extreme quartiles of the data distribution. Results: The intake of energy and nutrients, based on the 24 h dietary recalls, was inferior for the lower educational group (Po0.05). For the FFQs, just the protein and calcium intakes were statistically different, suggesting interference of the education variable in this assessment. Overestimations in the FFQs were identified in the analyses of means and medians for vitamin C and retinol intakes in the lower education group and for retinol in the higher education one. However, when evaluated by correlation coefficients non-adjusted and adjusted, they were well correlated. On the other hand, lipid (r ¼ 0.34) and calcium (r ¼ 0.13) coefficients of the group with less instruction showed beneath the desirable values, suggesting weak consistence of the estimates provided by the FFQs for these nutrients. Correlation means of r ¼ 0.65 and 0.54 were found for the higher and lower educational groups, respectively. Conclusions:The results indicate that FFQs showed acceptable performance on evaluating the habitual food consumption for most of the nutrients in the studied population. A tendency for better quantifications in the groups with higher education was observed, inferring its influence in the assessment of the dietary intake. Sponsorship: CAPES -Coordenação de aperfeiçoamento de pessoal de nível superior.

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Source of variance in 24-hour dietary recall data: implications for nutrition study design and interpretation. Carbohydrate sources, vitamins, and minerals

Cited by 337 publications

References 12 publications

Interpopulation and intrapopulation variability of nutrient intake in five regions of Japan

Interpopulation and intrapopulation variability of nutrient intake in five regions of Japan

Dietary magnesium intake and blood pressure: a qualitative overview of the observational studies

The influence of education in the validation process of a food frequency questionnaire for adults in Viçosa, Minas Gerais, Brazil

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