Use of table sugar and non-caloric sweeteners in Brazil: associated factors and changes across a decade.

This study evaluated changes in the use of sweeteners over one decade and the relationship between socio-demographics, diet and weight status with the type of sweetener. Data came from the Brazilian National Dietary Surveys of 2008-2009 and 2017-2018, including ≥ 10-year-old individuals (n 32 749; n 44 744, respectively, after excluding pregnant and lactating women). The use of table sugar, non-caloric sweeteners (NCS), both or none was reported through a specific question. Food consumption was assessed using two non-consecutive food records (2008-2009) and 24-h recalls (2017-2018). For the last survey, means of energy, macro and micronutrient intake, food groups' contribution (%) to daily energy intake and age- and energy-adjusted nutrient intake were estimated according to the type of sweetener used. Differences in means and proportions across the categories of sweeteners used were evaluated based on the 95 % CI. All analyses were stratified by sex and considered sample design and weights. Over 10 years, the use of table sugar decreased by 8 %, while the habit of not using any sweetener increased almost three times, and the use of NCS remained stable. Larger reductions in the use of table sugar were observed in the highest income level and among men. Regardless of sex, compared with NCS users, table sugar users had greater mean intake of energy, carbohydrates and added sugar and lower micronutrient intake means. Although table sugar is still the most used sweetener, the increased choice of 'no sweetener' is noteworthy in Brazil.

High protein diet promotes body weight loss among Brazilian postpartum women.

There is evidence in the general population that adhering to a high protein and low carbohydrate diet may help in losing weight. However, there is little evidence among postpartum women. The aim of this study is to evaluate the effect of a high protein diet on weight loss among postpartum women. A parallel-randomized controlled trial with 94 postpartum women was conducted in a maternity ward in Mesquita county (recruitment from February 2009 to December 2010) and in a polyclinic in Rio de Janeiro city (recruitment from December 2010 to December 2011). Women were randomized to the intervention group (IG) or control group (CG), and both groups received an isocaloric diet (1,800 kcal). Additionally, the IG received approximately 25 g of protein obtained from 125 g per week of sardine to increase daily dietary protein content and was advised to restrict carbohydrate intake. The CG received nutritional counselling to follow the national nutrition guidelines (15% protein, 60% carbohydrates, and 25% lipids). A linear mixed-effects model was used to test the effect of high protein intake and macronutrient intake on weight loss during the postpartum period. Body weight decreased in the IG compared with the CG (ß = -0.325; p = 0.049) among overweight and obese postpartum women. The percentage of energy intake from lipid (ß = -0.023; p = 0.050) was negatively associated with body weight, and carbohydrate intake (ß = 0.020; p = 0.026) was positively associated with body weight over time among all women. Protein intake and lower carbohydrate intake may be used as a dietary strategy to improve body weight loss during the postpartum period.

The association between obesity and race among Brazilian adults is dependent on sex and socio-economic status.

OBJECTIVE: To verify the association of race, independent of socio-economic status (SES), with obesity among Brazilian adults. DESIGN: We investigated data from the 2008-2009 Brazilian Household Budget Survey. Obesity was defined using the WHO classification. Self-declared race was classified as White, Black and 'Pardo' (Brown). Factor analysis with principal component extraction was used to derive the SES index. The association between race and obesity independent of SES, adjusted for demographic variables, was estimated using multiple logistic regression, accounting for the survey design. Interaction term between race and SES was tested. SETTING: Brazilian households (n 55 970). SUBJECTS: Adults aged 20-65 years (n 80 702). RESULTS: The prevalence of obesity was 14·9 %. The first factor explained 51 % of the variance and was used as a SES indicator. Odds of obesity increased with increasing SES level for men and for Black women, whereas Brown and White women showed a decrease of obesity. The association between race and obesity was modified by SES level in both sexes. At lower level of SES (-2 sd), Black and Brown in comparison to White men had 35 and 27 % decreased odds of obesity, respectively. For women, at lower SES level, only Black compared with White women had 30 % decreased odds of obesity. At the higher SES level (+2 sd), Black women compared with White presented a threefold increase of obesity. CONCLUSIONS: Racial disparities in obesity are SES level- and sex-dependent in Brazil. Strategies exclusively targeting reductions in SES disparities are likely ineffective for decreasing racial disparities in obesity among women.

Quality of food choices of Brazilian adolescents according to individual earnings.

OBJECTIVE: To evaluate the quality of food choices according to adolescent individual earnings in Brazil. DESIGN: Adolescents were classified according to their individual earnings as having or not having spending power for their own expenses. Food records from two non-consecutive days of the Brazilian National Dietary Survey (NDS 2008-2009) were used to estimate food intake. Quality of food choices was based on two approaches: (i) the NOVA classification, which classifies processed and ultra-processed foods and drinks as unhealthy food groups; and (ii) traditional classification, with beans, milk, fruits and vegetables as healthy food groups, and soft drinks, sweets, snacks and crackers classified as unhealthy. We compared mean food intake (g/kJ or ml/kJ) according to per capita household income (tertiles) and adolescent individual earnings, with adolescent earnings adjusted for household income, using multiple linear regression. SETTING: Brazilian households (n 13 569). SUBJECTS: Adolescents aged 14-18 years (n 3673). RESULTS: Males without individual earnings had higher per capita household income than those with individual earnings. Household income was associated with all three food groups of the NOVA classification and seven of the eight groups of the traditional classification. However, only beans and snacks were consumed in significantly greater quantities by adolescents with individual earnings compared with those without earnings. CONCLUSIONS: Adolescent individual earnings were not the main driver of food choices; however, per capita household income was associated with food choices. The consumption of both healthy and unhealthy items increased with increasing household income.

Major food sources contributing to energy intake--a nationwide survey of Brazilians aged 10 years and older.

Identification of major sources of energy in the diet helps to implement dietary recommendations to reduce obesity. To determine the food sources of energy consumed by Brazilians, we used the traditional method of ranking energy contribution of selected food groups and also compared days with and without consumption of specific food groups. Analysis was based on two non-consecutive days of dietary record from the Brazilian National Dietary Survey, conducted among 34,003 Brazilians (aged 10 years or more), taking into account the complex design of the survey. Comparison of days with and without consumption gave more consistent results, with sweets and cookies as the most important contributors to energy intake, increasing 992 kJ/d (95% CI 883, 1096) for those days when consumption of cakes, cookies and desserts was reported compared to days without their consumption. Savoury snacks, cheese and sugar-sweetened beverages (SSB) also increase energy intake by about 600 kJ. The only group associated with decreased energy intake was vegetable (-155 kJ; 95% CI -272, -37). Consumption of beans, milk and fruits increased the energy intake by about 210 kJ. In total, the mean energy intake of the group was 8000 kJ. Except for the consumption of vegetables, all of the other ten food groups analysed were associated with increased energy intake. Sweets and cookies may increase the energy intake by 12% and SSB by 7%, indicating that these two groups are major targets for improving healthy eating by reducing energy intake; whereas vegetable intake is associated with the reduction of energy content of the diet.

Independent associations of income and education with nutrient intakes in Brazilian adults: 2008-2009 National Dietary Survey.

OBJECTIVE: To verify associations of income and education with nutrient intakes in Brazilian adults. DESIGN: Data from the population-based National Dietary Survey conducted in 2008-2009. Family per capita income and education levels were categorized into quartiles. Prevalences of inadequate nutrient intakes and excessive intakes of saturated fat and Na were calculated by using the method prescribed by the National Cancer Institute. The Estimated Average Requirement was used as a reference for micronutrient intake. Linear regression models for both the independent and the mutually adjusted associations of education and income with nutrient intakes were tested. Interaction between education and income was tested. SETTING: Households (n 13 569) selected using a two-stage cluster sampling design. SUBJECTS: Food records for two non-consecutive days were obtained for 21 003 Brazilian adults (aged 20-59 years). RESULTS: For most of eleven nutrients, the prevalence of inadequate intake declined with increasing income and education levels; however, it remained high across all income and education quartiles. Excessive intake of saturated fat and low fibre intake increased with both variables. Most nutrients were independently associated with income and education in both sexes. Fe, vitamin B12 and Na intakes among women were associated only with education. There was an interaction between income and education for Na intake in men, P intake in women and Ca intake in both sexes. CONCLUSIONS: Education is one important step to improve nutrient intakes in Brazil. Emphasis should be laid on enhancing dietary knowledge and formulating economic strategies that would allow lower-income individuals to adopt a healthy diet.

Technological tools for assessing children's food intake: a scoping review.

Technological innovations can standardise and minimise reporting errors in dietary assessment. This scoping review aimed to summarise the characteristics of technological tools used to assess children's food intake. The review followed the Joanna Briggs Institute's manual. The main inclusion criterion was studied that assessed the dietary intake of children 0-9 years of age using technology. We also considered articles on validation and calibration of technologies. We retrieved 15 119 studies and 279 articles were read in full, after which we selected 93 works that met the eligibility criteria. Forty-six technologies were identified, 37 % of which had been developed in Europe and 32⋅6 % in North America; 65⋅2 % were self-administered; 27 % were used exclusively at home; 37 % involved web-based software and more than 80 % were in children over 6 years of age. 24HR was the most widely used traditional method in the technologies (56⋅5 %), and 47⋅8 % of the tools were validated. The review summarised helpful information for studies on using existing tools or that intend to develop or validate tools with various innovations. It focused on places with a shortage of such technologies.

Development of a mobile application to assess Brazilian schoolchildren's diet: CADE - food consumption at home and at school.

The development of technologies for children's dietary assessment shows important potential for reducing the occurrence of inherent errors in traditional methods. The present study aimed to describe the development of a mobile app for the dietary assessment of Brazilian schoolchildren. The mobile app assesses schoolchildren's diet with self-report by their parents or guardians in the home environment, through multiple-pass 24-hour recall coupled with a food propensity questionnaire; and by an adult in the school environment, through a food record. The tool presents a database of food items usually consumed by Brazilian schoolchildren, including modes of preparation, probing foods and types of food quantification such as digital photos of household measurements and food portions. The CADE app (food consumption at home and at school) contains 2125 food items, 9 options for preparation methods and 18 options for probing items. There are 75 options for household measurements, also including 26 digital photos of four types of household measurements and 440 photos of portion sizes of 90 foods from the Brazilian Manual of Child Food Portion Quantification. Some innovative features include an interface to take photos of the child's meals and report seconds and leftover food consumption, besides the possibility of receiving notifications on the mobile device to remember to report the diet. The CADE app can assist the standardisation and automation of dietary data collection from schoolchildren, support food and nutrition data in childhood and promote research in nutritional epidemiology while reducing data collection costs.

Association between the consumption of sugar-sweetened beverages and food markers: National Dietary Survey 2008-2009.

We aimed to analyze the association between sugar-sweetened beverage (SSB) consumption with healthy food markers (HFM) and unhealthy food markers (UFM) as well as their impact on these markers in the Brazilian population's diet. Food consumption during two nonconsecutive days of food records of individuals aged ten years or over were investigated in the National Dietary Survey 2008-2009 (n = 32,900) and the caloric contributions of HFM and UFM were distributed according to the categories of SSB consumption. Multiple linear regression was applied to analyze the associations between the consumption of SSB and the impact of a 50% reduction in portion size and dietary markers. The contribution of energy from HFM was higher among individuals who did not consume SSB. A 50% reduction in the average portion of SSB in the population would imply a 6% decrease in energy contribution to the diet and 12% decrease in total energy from added sugar. It would increase the consumption of HFM and dietary fiber by 7g and 4g, respectively. A 50% reduction in SSB serving size is a strategy that could improve the quality of the diet, increase the consumption of HFM and fiber and reduce the consumption of sugar and UFM.

Limitations in the comparison of the Brazilian National Dietary Surveys of 2008-2009 and 2017-2018.

OBJETIVE: To present particular characteristics of two Brazilian National Dietary Surveys (Inquéritos Nacionais de Alimentação - INA) and the methodology used to better compare their data. METHODS: This study details the differences between both INA conducted by the Brazilian Institute of Geography and Statistics (IBGE) in 2008-2009 and 2017-2018. We present the alterations in data collecting methods and food composition tables as well as the analysis strategies recommended to obtain such data. A validation study with 95 participants of the third wave of the Longitudinal Study of Adult Health assessed the measurement error associated with the procedures adopted in the 24-hours dietary recall of INA 2017-2018. The reference standards were urinary protein recovery, sodium, and potassium biomarkers. Different strategies were used in the analysis of INA to compare two essential dietary items that had their collection method changed: fats and sugars. RESULTS: The validation study indicated lower underreport in the most recent survey with higher means of energy intake. The correlation of means for the 24-hours recalls with their respective biomarkers was 0.58 for proteins, 0.31 for potassium, and 0.30 for sodium. Comparing the food composition tables used in both surveys with the data obtained by INA 2008-2009, the mean variation of energy, macronutrients, and minerals was lower than 15%, except for trans fats and selenium, which had means 40% and 52% lower in the Tabela Brasileira de Composição de Alimentos (TBCA - Brazilian Food Composition Table). INA 2017-2018 presents lower means for added sugar, using a generic question about the frequency of sugar consumption as a measure for sugar as an additional item. CONCLUSION: The methodological changes promoted in the most recent INA enhanced food groups and nutrients intake estimation, adding detailed and specific data in dietary habits reports.

Evolution of energy and nutrient intake in Brazil between 2008-2009 and 2017-2018.

OBJECTIVE: To assess the evolution of energy and nutrient intake and the prevalence of inadequate micronutrients intakes according to sociodemographic characteristics and Brazilian regions. METHODS: The food consumption of 32,749 individuals from the National Dietary Survey of the Household Budget Survey 2008-2009 was analyzed by two food registries, as well as 44,744 subjects from two 24-hour recalls in 2017-2018. Usual intake and percentage of individuals with consumption below the average recommendation for calcium, magnesium, phosphorus, copper and zinc, vitamins A, C, D, E, thiamine, riboflavin, pyridoxine and cobalamin were estimated. Sodium intake was compared to the reference value to reduce the risk of chronic diseases. Analyses were stratified by sex, age group, region and income. RESULTS: Mean daily energy intake was 1,753 kcal in 2008-2009 and 1,748 kcal in 2017-2018. The highest prevalence of inadequacy (> 50%) in the two periods were calcium; magnesium; vitamins A, D and E; pyridoxine and, only among adolescents, phosphorus. There was an increase in the prevalence of inadequate vitamin A, riboflavin, cobalamin, magnesium, and zinc among women, and riboflavin among men. The prevalence of inadequacy decreased for thiamine. Sodium intake was excessive in approximately 50% of the population in both periods. The highest variations (about 50%) in the prevalence of inadequacy between the lowest and highest income (< 0.5 minimum wage and > 2 minimum wages per capita) were observed for vitamin B12 and C in both periods. The North and Northeast regions had the highest prevalence of inadequacy. CONCLUSION: Both surveys found high prevalence of inadequate nutrient intake and excessive sodium intake. The inadequacy varies according to income strata, increasing in the poorest regions of the country.

Relationship between Dietary Fatty Acid Intake with Nonalcoholic Fatty Liver Disease and Liver Fibrosis in People with HIV.

We aimed to evaluate the relationship between food intake of lipids with nonalcoholic fatty liver disease (NAFLD) and/or liver fibrosis in people living with HIV/AIDS (PLWHA). In this cross-sectional study, transient elastography was used to detect the presence of NAFLD and/or liver fibrosis. The dietary intake of fats and fatty acids (FA) were assessed by two 24 h dietary recalls (24-HDR) (n = 451). Multivariate logistic regression models were performed. Participants with higher intake of total fat were associated with higher odds for NAFLD compared to those with lower consumption [adjusted odds ratio (aOR) = 1.91 (95% confidence interval (95% CI) 1.06-3.44)]. Furthermore, participants with intermediate intake of n6-PUFA (n6-poly-unsaturated FA) and lauric FA had lower odds for NAFLD, respectively aOR = 0.54 (95% CI 0.3-0.98) and aOR = 0.42 (95% CI 0.22-0.78). Additionally, a higher intake of myristoleic FA (fourth quartile) was a significant protective factor for NAFLD [aOR = 0.56 (95% CI 0.32-0.99)]. Participants with higher intake of lauric FA [0.38 (95% CI 0.18-0.80)], myristic FA [0.38 (0.17-0.89)], palmitoleic FA [0.40 (0.19-0.82)] and oleic FA [0.35 (0.16-0.79)] had positively less odds of having liver fibrosis. On the other hand, higher intake of n-6 PUFA was significantly associated with fibrosis [aOR = 2.45 (95% CI 1.12-5.32)]. Dietary assessment of total fat and FA should be incorporated into HIV care as a tool for preventing NAFLD and fibrosis in PLWHA.

[Critical analysis of the revised diet quality index for the Brazilian population (DQI-R): its application in ELSA-Brasil]. / Análise crítica do índice de qualidade da dieta revisado para a população brasileira (IQD-R): aplicação no ELSA-Brasil.

The scope of this study was to conduct a critical analysis of the application of the Brazilian Healthy Eating Index - Revised (BHEI-R), to explain the ease and difficulties in its calculation, to suggest adaptations and to compare its distribution. This was done in accordance with sociodemographic variables among the 15,105 public servants participating in the Longitudinal Study of Adult Health from 2008 to 2010. Food consumption was assessed based on a Food Frequency Questionnaire and BHEI-R was estimated in four ways: original; weighted for frequency of consumption of fruits and vegetables; modified considering legumes separated from other vegetables, and adapted covering the two previous changes. The results indicated that irrespective of the adaptation performed, women, individuals over 65 years of age and individuals with lower schooling had higher mean scores indicating a better quality diet. It is believed that the proposed adaptations may be useful for future studies that apply BHEI-R.

O objetivo deste estudo foi analisar criticamente a aplicação do Índice de Qualidade da Dieta ­ Revisado (IQD-R), explicitar facilidades e dificuldades em seu cálculo, sugerir adaptações e comparar sua distribuição segundo variáveis sociodemográficas entre os 15.105 servidores públicos participantes do Estudo Longitudinal de Saúde do Adulto, no período de 2008 a 2010. O consumo alimentar foi aferido com base em Questionário de Frequência Alimentar e o IQD-R foi estimado de quatro maneiras: original; ponderado para frequência de consumo de frutas e hortaliças; modificado considerando leguminosas separado dos demais vegetais e adaptado abrangendo as duas alterações anteriores. Os resultados indicaram que independentemente da adaptação realizada, as mulheres, os indivíduos com mais de 65 anos e os indivíduos de menor escolaridade apresentaram escores médios mais altos indicando dieta de melhor qualidade. Acredita-se que as adaptações propostas podem ser úteis para estudos futuros que apliquem o IQD-R.

Technology in Health: Brazilian version of the GloboDiet program for dietary intake assessment in epidemiological studies. / Tecnologia em Saúde: versão brasileira do software GloboDiet para avaliação do consumo alimentar em estudos epidemiológicos.

The 24-hour recall (R24h) has been the method for dietary assessment in surveys. Technological advances have allowed the development of a program for the collection of R24h data. International Agency for Research on Cancer-World Health Organization (IARC-WHO) developed a standardized interview and computer-based 24-hour dietary recall program called GloboDiet, aimed at using it in research and nutrition surveillance. Brazil was included in a project for the global expansion of this methodology for developing and adapting a version for national use. The adaptation followed the procedures established by the IARC-WHO that considered the translation and adaptation of approximately 70 databases. For the development of the food list, national databases of food consumption from national surveys were consulted obtaining a final list of 2113 foods and recipes. GloboDiet program guides an interview in five steps: general information of the participant; quick list of foods and recipes; details of food / recipes and quantities consumed using mainly a picture book; control of the amount of food and nutrients; and information on dietary supplements. The Brazilian version of the GloboDiet program will provide a more accurate assessment of food intake based on a standardized method for nutrition surveillance and investigation of the relationship between diet and health outcomes, as well as comparisons of dietary intakes within and between countries.

O Recordatório Alimentar de 24 horas (R24h) tem sido o método de escolha para a avaliação da dieta em inquéritos populacionais. Os avanços tecnológicos permitiram o desenvolvimento de softwares para a coleta de dados de R24h. A International Agency for Research on Cancer-World Health Organization (IARC-WHO) desenvolveu metodologia para avaliação do consumo alimentar de forma padronizada e personalizada, o GloboDiet, com o objetivo de utilizá-la em pesquisas e em estudos de vigilância alimentar e nutricional. O Brasil, inserido em um projeto para expansão global dessa metodologia, desenvolveu e adaptou uma versão para uso nacional. A adaptação considerou a tradução e adequação de aproximadamente 70 bases de dados. Para a elaboração da lista de alimentos, foram consultados bancos de dados nacionais de estudos de consumo alimentar, obtendo-se um rol de 2.113 alimentos e receitas. O software GloboDiet orienta uma entrevista que se desenvolve em cinco etapas: informações gerais do participante; lista rápida de alimentos e receitas; detalhamento dos alimentos/das receitas e das quantidades consumidas por meio, principalmente, do manual fotográfico; controle da quantidade de alimentos e nutrientes; e informações sobre o uso de suplementos dietéticos. A versão brasileira do software proporcionará uma avaliação mais acurada do consumo alimentar com base em uma metodologia padronizada para fins de vigilância alimentar e nutricional e de investigação da relação da dieta com desfechos em saúde, além de permitir a comparabilidade dos dados de consumo alimentar em estudos no âmbito nacional e internacional.

Are there differences in nutrient intake of Brazilian adults according to weight status?

It was assessed the intake and prevalence of inadequate nutrient intake according to weight status among Brazilian adults from urban areas (n=16,198) evaluated in the Brazilian National Dietary Survey (NDS - 2008-2009), that obtained food records from two non-consecutive days. The prevalence of inadequate nutrient intake according to weight status was estimated based on Brazilian and international recommendations, in which usual intake was estimated applying the National Cancer Institute method. From 14 nutrients evaluated, six differed according to weight status in men, and only two among women. For men, the mean proportion of energy derived from lipids and saturated fat and mean intake of cholesterol, zinc, and vitamin B12 were greater among those with excess weight compared to those with normal weight; the inverse was observed for dietary fiber. Mean sodium intake was greater and proportion of energy from added sugar intake was lower among obese women compared to overweight ones. Strategies to encourage food consumption with high micronutrient density should be targeted to adult population regardless of their weight status.

Association between the consumption of sugar-sweetened beverages and food markers: National Dietary Survey 2008-2009 / Associação entre o consumo de bebidas adoçadas e marcadores da alimentação: Inquérito Nacional de Alimentação 2008-2009

Abstract We aimed to analyze the association between sugar-sweetened beverage (SSB) consumption with healthy food markers (HFM) and unhealthy food markers (UFM) as well as their impact on these markers in the Brazilian population's diet. Food consumption during two nonconsecutive days of food records of individuals aged ten years or over were investigated in the National Dietary Survey 2008-2009 (n = 32,900) and the caloric contributions of HFM and UFM were distributed according to the categories of SSB consumption. Multiple linear regression was applied to analyze the associations between the consumption of SSB and the impact of a 50% reduction in portion size and dietary markers. The contribution of energy from HFM was higher among individuals who did not consume SSB. A 50% reduction in the average portion of SSB in the population would imply a 6% decrease in energy contribution to the diet and 12% decrease in total energy from added sugar. It would increase the consumption of HFM and dietary fiber by 7g and 4g, respectively. A 50% reduction in SSB serving size is a strategy that could improve the quality of the diet, increase the consumption of HFM and fiber and reduce the consumption of sugar and UFM.

Resumo Analisar a associação entre o consumo de bebidas adoçadas (BA) e marcadores da alimentação saudável ​​(MAS) e não saudável ​​(MANS), bem como seu impacto sobre esses marcadores na dieta da população brasileira. Os dados de consumo alimentar foram analisados ​​por meio de registros alimentares de dois dias não consecutivos em indivíduos com 10 anos ou mais de idade investigados no Inquérito Nacional de Alimentação (INA) de 2008-2009 (n = 32.900). As BA, as contribuições calóricas dos MAS e MANS foram distribuídas de acordo com as categorias de consumo das BA. A regressão linear múltipla foi aplicada para analisar associações entre o consumo de BA e o impacto de uma redução de 50% no tamanho da porção e marcadores da alimentação. A contribuição da energia dos MAS foi maior entre os indivíduos que não consumiam BA. A redução de 50% na porção média das BA na população implicaria uma diminuição de 6% na contribuição de energia da dieta, de 12% na energia total do açúcar de adição e teria um aumento no consumo de MAS e fibra alimentar em 7g e 4g, respectivamente. A redução de 50% no tamanho da porção das BA seria uma estratégia para melhorar a qualidade da dieta, aumentar o consumo de MAS e fibra e reduzir o consumo de açúcar e MANS.

Design of a school randomized trial for nudging students towards healthy diet and physical activity to prevent obesity: PAAPAS Nudge study protocol.

OBJECTIVE: To evaluate the effectiveness of nudge activities at school on the students' body mass index (BMI). DESIGN: School-based factorial randomized community trial. SETTING: Eighteen public schools in the municipality of Duque de Caxias, metropolitan area of Rio de Janeiro, Brazil. PARTICIPANTS AND INTERVENTION: The 18 schools will be randomized into 4 group arms: group 1-control (without any activity); group 2-will receive educational activities in the classroom; group 3-will receive changes in the school environment (nudge strategies); group 4-will receive educational activities and changes in the school environment. Activities will occur during the 2018 school-year. MAIN OUTCOME MEASURE(S): The primary (BMI) and secondary (body fat percentage) outcomes will be assessed at baseline and after the study using a portable electronic scale with a segmental body composition monitor. The height will be measured by a portable stadiometer. ANALYSIS: Statistical analyses for each outcome will be conducted through linear mixed models that took into account the missing data and cluster effect of the schools.

Evolution of energy and nutrient intake in Brazil between 2008-2009 and 2017-2018 / Evolução da ingestão de energia e nutrientes no Brasil entre 2008-2009 e 2017-2018

ABSTRACT OBJECTIVE: To assess the evolution of energy and nutrient intake and the prevalence of inadequate micronutrients intakes according to sociodemographic characteristics and Brazilian regions. METHODS: The food consumption of 32,749 individuals from the National Dietary Survey of the Household Budget Survey 2008-2009 was analyzed by two food registries, as well as 44,744 subjects from two 24-hour recalls in 2017-2018. Usual intake and percentage of individuals with consumption below the average recommendation for calcium, magnesium, phosphorus, copper and zinc, vitamins A, C, D, E, thiamine, riboflavin, pyridoxine and cobalamin were estimated. Sodium intake was compared to the reference value to reduce the risk of chronic diseases. Analyses were stratified by sex, age group, region and income. RESULTS: Mean daily energy intake was 1,753 kcal in 2008-2009 and 1,748 kcal in 2017-2018. The highest prevalence of inadequacy (> 50%) in the two periods were calcium; magnesium; vitamins A, D and E; pyridoxine and, only among adolescents, phosphorus. There was an increase in the prevalence of inadequate vitamin A, riboflavin, cobalamin, magnesium, and zinc among women, and riboflavin among men. The prevalence of inadequacy decreased for thiamine. Sodium intake was excessive in approximately 50% of the population in both periods. The highest variations (about 50%) in the prevalence of inadequacy between the lowest and highest income (< 0.5 minimum wage and > 2 minimum wages per capita) were observed for vitamin B12 and C in both periods. The North and Northeast regions had the highest prevalence of inadequacy. CONCLUSION: Both surveys found high prevalence of inadequate nutrient intake and excessive sodium intake. The inadequacy varies according to income strata, increasing in the poorest regions of the country.

RESUMO OBJETIVO: Avaliar a evolução da ingestão de energia e nutrientes e a prevalência de inadequação da ingestão de micronutrientes segundo características sociodemográficas e regiões brasileiras. MÉTODOS: Foi analisado o consumo alimentar de 32.749 indivíduos do Inquérito Nacional de Alimentação da Pesquisa de Orçamentos Familiares de 2008-2009, por dois registros alimentares, e de 44.744 indivíduos a partir de dois recordatórios de 24 horas em 2017-2018. Estimaram-se a ingestão usual e o percentual de indivíduos com consumo abaixo da necessidade média para cálcio, magnésio, fósforo, cobre e zinco, vitaminas A, C, D, E, tiamina, riboflavina, piridoxina e cobalamina. A ingestão de sódio foi comparada ao valor de referência para reduzir risco de doenças crônicas. As análises foram estratificadas por sexo, faixa etária, região e renda. RESULTADOS: A ingestão energética diária média foi de 1.753 kcal em 2008-2009 e 1.748 kcal em 2017-2018. As prevalências de inadequação mais elevadas (> 50%) nos dois períodos foram de cálcio, magnésio, vitaminas A, D e E, piridoxina e, somente entre adolescentes, fósforo. Houve aumento na prevalência de inadequação de vitamina A, riboflavina, cobalamina, magnésio e zinco entre as mulheres, e de riboflavina entre os homens. A prevalência de inadequação diminuiu para a tiamina. A ingestão de sódio foi excessiva em aproximadamente 50% da população nos dois períodos. As variações mais altas (cerca de 50%) nas prevalências de inadequação entre os extremos de renda (< 0,5 salário-mínimo e > 2 salários-mínimos per capita) foram observadas para vitamina B12 e C nos dois períodos. As regiões Norte e Nordeste apresentaram maiores prevalências de inadequação. CONCLUSÃO: Ambos os inquéritos verificaram prevalências elevadas de inadequação de ingestão de nutrientes e consumo excessivo de sódio. A inadequação varia de acordo com os estratos de renda, aumentando nas regiões mais pobres do país.

Limitations in the comparison of the Brazilian National Dietary Surveys of 2008-2009 and 2017-2018 / Limitações na comparação dos Inquéritos Nacionais de Alimentação de 2008-2009 e 2017-2018

ABSTRACT OBJETIVE: To present particular characteristics of two Brazilian National Dietary Surveys (Inquéritos Nacionais de Alimentação - INA) and the methodology used to better compare their data. METHODS: This study details the differences between both INA conducted by the Brazilian Institute of Geography and Statistics (IBGE) in 2008-2009 and 2017-2018. We present the alterations in data collecting methods and food composition tables as well as the analysis strategies recommended to obtain such data. A validation study with 95 participants of the third wave of the Longitudinal Study of Adult Health assessed the measurement error associated with the procedures adopted in the 24-hours dietary recall of INA 2017-2018. The reference standards were urinary protein recovery, sodium, and potassium biomarkers. Different strategies were used in the analysis of INA to compare two essential dietary items that had their collection method changed: fats and sugars. RESULTS: The validation study indicated lower underreport in the most recent survey with higher means of energy intake. The correlation of means for the 24-hours recalls with their respective biomarkers was 0.58 for proteins, 0.31 for potassium, and 0.30 for sodium. Comparing the food composition tables used in both surveys with the data obtained by INA 2008-2009, the mean variation of energy, macronutrients, and minerals was lower than 15%, except for trans fats and selenium, which had means 40% and 52% lower in the Tabela Brasileira de Composição de Alimentos (TBCA - Brazilian Food Composition Table). INA 2017-2018 presents lower means for added sugar, using a generic question about the frequency of sugar consumption as a measure for sugar as an additional item. CONCLUSION: The methodological changes promoted in the most recent INA enhanced food groups and nutrients intake estimation, adding detailed and specific data in dietary habits reports.

RESUMO OBJETIVO: Apresentar particularidades dos dois Inquéritos Nacionais de Alimentação (INA) e o processo metodológico empregado para comparação dos dados. MÉTODOS: O estudo detalha as diferenças entre os INA realizados pelo IBGE em 2008-2009 e em 2017-2018, apresentando as alterações nos métodos de coleta de dados e nas tabelas de composição dos alimentos, assim como as estratégias de análise recomendadas para comparação dos dados. Um estudo de validação foi realizado com 95 participantes da terceira onda do Estudo Longitudinal de Saúde do Adulto a fim de avaliar o erro de medição associado aos procedimentos adotados nos recordatórios de 24 horas do INA 2017-2018. Empregaram-se biomarcadores de recuperação urinária de proteínas, sódio e potássio como padrões de referência. Na análise dos INA, diferentes estratégias foram elaboradas para comparar dois itens importantes do consumo alimentar que sofreram mudanças na forma de coleta: as gorduras e os açúcares. RESULTADOS: O estudo de validação do instrumento indicou menor sub-relato no inquérito mais recente, com maiores médias de ingestão de energia. A correlação das medidas dos recordatórios de 24 horas com os respectivos biomarcadores foi de 0,58 para proteínas, 0,31 para potássio e 0,30 para sódio. Comparando as tabelas de composição utilizadas nos dois inquéritos com os dados obtidos no INA 2008-2009, a variação média de energia, macronutrientes e minerais foi menor que 15%, com exceção das gorduras trans e selênio, com médias 40% e 52% menores na TBCA. No INA 2017-2018, as médias do consumo de açúcar de adição foram menores, usando a informação do açúcar reportado como item de adição comparada com a pergunta genérica sobre a frequência do uso do açúcar. CONCLUSÃO: As mudanças metodológicas incluídas no INA atual permitiram aprimorar as estimativas de consumo de grupos de alimentos e nutrientes, acrescentando informações mais detalhadas e específicas aos relatos do consumo alimentar.

Análise crítica do índice de qualidade da dieta revisado para a população brasileira (IQD-R): aplicação no ELSA-Brasil / Critical analysis of the revised diet quality index for the Brazilian population (DQI-R): its application in ELSA-Brasil

Resumo O objetivo deste estudo foi analisar criticamente a aplicação do Índice de Qualidade da Dieta - Revisado (IQD-R), explicitar facilidades e dificuldades em seu cálculo, sugerir adaptações e comparar sua distribuição segundo variáveis sociodemográficas entre os 15.105 servidores públicos participantes do Estudo Longitudinal de Saúde do Adulto, no período de 2008 a 2010. O consumo alimentar foi aferido com base em Questionário de Frequência Alimentar e o IQD-R foi estimado de quatro maneiras: original; ponderado para frequência de consumo de frutas e hortaliças; modificado considerando leguminosas separado dos demais vegetais e adaptado abrangendo as duas alterações anteriores. Os resultados indicaram que independentemente da adaptação realizada, as mulheres, os indivíduos com mais de 65 anos e os indivíduos de menor escolaridade apresentaram escores médios mais altos indicando dieta de melhor qualidade. Acredita-se que as adaptações propostas podem ser úteis para estudos futuros que apliquem o IQD-R.

Abstract The scope of this study was to conduct a critical analysis of the application of the Brazilian Healthy Eating Index - Revised (BHEI-R), to explain the ease and difficulties in its calculation, to suggest adaptations and to compare its distribution. This was done in accordance with sociodemographic variables among the 15,105 public servants participating in the Longitudinal Study of Adult Health from 2008 to 2010. Food consumption was assessed based on a Food Frequency Questionnaire and BHEI-R was estimated in four ways: original; weighted for frequency of consumption of fruits and vegetables; modified considering legumes separated from other vegetables, and adapted covering the two previous changes. The results indicated that irrespective of the adaptation performed, women, individuals over 65 years of age and individuals with lower schooling had higher mean scores indicating a better quality diet. It is believed that the proposed adaptations may be useful for future studies that apply BHEI-R.