Variância intrapessoal da ingestão de energia e nutrientes em adolescentes: correção de dados em estudos epidemiológicos

Abstract

These results can be used to estimate habitual energy and nutrient intake for adolescent population when it is only a single dietary measurement.

Serum Retinol Levels in Pregnant Adolescents and Their Relationship with Habitual Food Intake, Infection and Obstetric, Nutritional and Socioeconomic Variables

“…Data from 24HR were used ( n = 89) and applied at baseline, and 40% were replicated at the second moment ( n = 36), considering the range of up to 2 months [21,22]. The recall composition analysis was made by NutWin software, version 1.5, of the Department of Health Informatics of the Federal University of São Paulo [23].…”

Brazilians’ experiences with iron fortification: evidence of effectiveness for reducing inadequate iron intakes with fortified flour policy

“…Nevertheless, in the pre-fortification period, there was only a single measurement for each participant. According to previous studies (13,14) , in cases of absence of the repetition of the 24HR, it is advised that the withinperson variance component from a study with a similar population should be applied in order to correctly estimate the distribution of usual nutrient intake. Therefore, to correct the distribution of Fe intake in the pre-fortification period, we applied the variance components derived from the post-fortification period.…”

Consumo alimentar e adequação nutricional em crianças brasileiras: revisão sistemática

“…The number of days of survey application is an important aspect to consider, as by increasing the number of days one can minimize the effects of intra-individual variability. 39 In population studies, the application of 24-hour recalls for two nonconsecutive days seems to have similar results to applications for more days. To obtain the mean consumption by direct weighing, the application for 3 non-consecutive days is recommended.…”

“…42 Therefore, it is necessary to consider the intra-individual variability, as food consumption of the same individual varies from day to day, as well as the variability of needs, because even at the same stage of life, there are differences in the needs of each individual. 39 Recently, Castro et al 43 estimated values of intraand interpersonal variance for children aged 1-6 years through multilevel analysis, in addition to calculating the rate of variation and the number of days of dietary assessment of energy and nutrients, according to age and body weight. However, there are no Brazilian studies for the other age groups of children that have evaluated the intra-and interpersonal variability and, therefore, American data are still used.…”

“…O número de dias de aplicação de um inquérito é um aspecto importante a se considerar, pois aumentando-se o número de dias podem-se minimizar os efeitos da variabilidade intraindividual. 39 Em estudos populacionais, a aplicação do recordatórios de 24 horas por dois dias não consecutivos parece apresentar resultados semelhantes a aplicações por mais dias. Para obter o consumo médio por meio da pesagem direta de alimentos, recomenda-se a aplicação por três dias não consecutivos.…”