Publications by authors named "Leonardo Pozza Santos"

Type 2 diabetes (T2DM), hypertension, and obesity are major contributors to global mortality. This study aimed to evaluate eating behavior and dietary practices among individuals with T2DM and/or hypertension, examining their associations with sociodemographic and anthropometric characteristics. We hypothesized that these factors may contribute to body mass index (BMI) and body fat (BF) levels in these individuals.

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To evaluate the association of standardized phase angle (SPA) with nutritional status, functional parameters, and postoperative outcomes in surgical cancer patients. This prospective study includes 59 cancer patients from Pelotas (Brazil) admitted for elective cancer surgery. We obtained the phase angle through Bioelectrical Impedance Analysis (BIA) and standardized it according to the population's reference values.

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Article Synopsis
  • - The longitudinal study in Brazil assessed how physical performance (PP) affects health outcomes like disability, falls, and hospitalization among older adults (N = 476, average age 68) over a 5-6 year period.
  • - Key tests used to measure PP were Gait Speed (GS) and Timed Up and Go (TUG), revealing that low performance in these areas correlated with increased disability, falls, and hospital stays after accounting for factors like economic status and health conditions.
  • - The findings suggest that regular assessments of physical performance can help identify older adults at risk for negative health outcomes, highlighting the importance of preventative measures.
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Given the importance of diet in early life, assessing children's diet is crucial to guide interventions. Using data from a nationally generalizable New Zealand (NZ) birth cohort we examined children's dietary patterns at 9- (n = 6259), 24- (n = 6292), and 54-months (n = 6131), and their association with maternal sociodemographic and health behaviours. At each time-point, children's dietary patterns were identified using principal components analysis.

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Introduction: Nutritional deficiency, especially malnutrition, is frequent in cancer patients and is associated with changes in body composition, such as low muscle mass. Phase angle (PhA) has been used as a prognostic indicator and may be related to nutritional status, functionality, and quality of life in these patients. The objectives of this study were to assess the effect of chemotherapy treatment on PhA values, comparing the PhA variation before and after treatment, and to evaluate the PhA correlation, as a muscle mass surrogate, with the physical domain of quality of life, functionality, and nutritional risk in a sample of patients with cancer.

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Changes in physical performance (PP) occur with aging, and understanding the magnitude of these changes over time is important. This study evaluated changes in Gait Speed (GS) and Timed Up and Go (TUG) performance and their association with related factors among community-dwelling older adults over a period of five to six years. A cohort study of 476 older adults with baseline assessment conducted in 2014 and reassessment in 2019-2020 was carried out.

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Background: Sugar-sweetened beverages (SSB) are associated with adverse outcomes in adults and understanding the strength, consistency and biological gradient of the association between SSB consumption and health-related outcomes is important. We aimed to examine longitudinal associations between sugar-sweetened beverages (SSB) intake and obesity and cardiometabolic diseases (type 2 diabetes, coronary heart disease and stroke) in adults.

Methods: We performed a systematic review and meta-analysis searching for articles published until December 2021 in the Pubmed, Lilacs, Web of Science, Cochrane, Embase, and Scopus databases (PROSPERO CRD42021234206).

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Objective: This study aimed to evaluate the association between sleep duration and quality and mental health before and amid the COVID-19 pandemic.

Methods: Data from two population-based cross-sectional studies conducted in 2019 and 2020 with adults in Criciúma, Southern Brazil. The Patient Health Questionnaire-9 (PHQ-9) was used to screen major depressive episodes, while the perceived stress scale was used to assess perceived stress.

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The Covid-19 pandemic is related to increased alcohol consumption and smoking. These behaviors may be related to several sociodemographic, behavioral and mental health factors. Thus, the aim of this study was to assess the association between alcohol consumption and cigarette smoking with sociodemographic, behavioral and mental health characteristics.

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Background: This study aims to investigate inequalities in leisure-time physical activity (PA) practice amid the COVID-19 pandemic in a southern Brazilian city.

Methods: Four repeated population-based surveys were carried out. PA was collected using a questionnaire proposed by the authors and an adapted version of the leisure-time section of the International Physical Activity Questionnaire.

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Objective: To assess regional and social inequalities in mammography and Papanicolaou tests.

Methods: This was a cross-sectional study with data from the 2019 Chronic Disease Risk and Protective Factors Surveillance Telephone Survey (Vigitel). The outcome variables were mammography and cytopathology test.

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Objective: To assess the association between household food insecurity (FI) and major depressive episodes (MDE) amid Covid-19 pandemic in Brazil.

Design: Cross-sectional study carried out with data from four consecutive population-based studies.

Setting: The study was conducted between May and June 2020, in Bagé, a Brazilian southern city.

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To describe the inequalities in the double burden of malnutrition (DBM) in the adult population. Study carried out with data from the VIGITEL study, conducted in 2019 in all Brazilian capitals. Underweight and excess weight were evaluated on the basis of years of schooling and age.

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Background: We aimed to investigate the association between preterm birth and body composition at 6, 18, and 30 years of age using data from three population-based birth cohort studies.

Methods: Gestational age (GA), defined by the date of the last menstrual period (categorized in ≤33, 34-36, and ≥ 37 weeks), was gathered in the first 24-h after delivery for all live births occurring in the city of Pelotas, Brazil, in 2004, 1993 and 1982. Body composition was assessed by air-displacement plethysmography.

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This study aimed to describe leisure-time physical activity (LPA) during the COVID-19 pandemic in a municipality of Rio Grande do Sul state, southern Brazil, according to gender, level of education, and adherence to social distancing. A population-based and cross-sectional descriptive study was carried out in Bagé (RS), Brazil. LPA during the pandemic, place of activity, and Physical Education professional's supervision, were described.

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Background: Despite available information on trends in behavioral factors for Brazil and Argentina, little is known about the association of these trends with mortality. Understanding this association is important to avoid early deaths. Therefore, we aimed to evaluate temporal trends in behavioral risk and protective factors in Brazil and Argentina, and to assess their association with overall and cause-specific mortality rates.

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The objective of this study was to investigate intergenerational breastfeeding practices according to parental sex and age at delivery in the 1993 Pelotas (Brazil) birth cohort study. This is a prospective birth cohort study, and at the 22-year follow-up, a substudy with all children of the cohort members who had become parents was conducted (93Cohort-II). First generation breastfeeding data were collected at 3 months and 4-year-old follow-ups.

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Background: Low appendicular skeletal muscle mass (ASM) is associated with negative outcomes, but its assessment requires proper limb muscle evaluation. We aimed to verify how anthropometric circumferences are correlated to ASM and to develop new prediction equations based on calf circumference and other anthropometric measures, using dual-energy X-ray absorptiometry (DEXA) as the reference method.

Methods: DEXA and anthropometric information from 15,293 adults surveyed in the 1999-2006 NHANES were evaluated.

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Background: Differences in total body and regional adiposity according to sex are observed from an early age, but these differences become more evident after puberty due to hormonal changes. We aimed to assess the evolution of total body and regional adiposity from 18 to 22 years of age and the associated sociodemographic and nutritional characteristics.

Methods: In total, 3274 individuals from the 1993 Pelotas birth cohort study followed up at 18 and 22 years of age.

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Children weight gain is mostly due to fat-free mass than fat mass, but the changes in body composition dynamics related to child growth can be attributed to the obesity epidemic. We aimed to assess changes in measures of body composition from 6 to 11 years of age according to sex, and to examine whether changes in these measures are associated with sociodemographic characteristics. A longitudinal study using data from the 2004 Pelotas Birth Cohort was conducted, and assessed body composition and fat distribution through measures of BMI, fat mass index, fat-free mass index, and android and gynoid fat mass percentages from DXA.

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Objective: We developed and described a new equation to estimate fat-free mass derived from BIA using a sample population from Brazil and having Dual-energy X-ray absorptiometry (DXA) as the reference method. We also compared this new equation with two published and widely used equations developed in high-income countries.

Methods: Cross-sectional study with 294 healthy adults from Pelotas, Brazil.

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Purpose: To assess the association between dietary intake patterns from 1 to 4 years and BMI and body shape at age of 6 years.

Methods: This longitudinal study was based on 3374 Brazilian children from the 2004 Pelotas Birth Cohort Study. We used previously described dietary patterns from 1 to 4 years as the main exposure.

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Objective: The aim of this study was to examine the association between early feeding practices and consumption of ultraprocessed foods in children at age 6 y.

Methods: This was a prospective cohort study using data from 3427 children who participated in the 2004 Pelotas Cohort Study and who had available food frequency questionnaire information at 6 y. Information about exclusive and total breastfeeding duration as well as age at introduction of semisolid and solid foods was used to define early feeding practices.

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Background: Association between caesarian section (C-section) and obesity is controversial and mostly based on body mass index (BMI), which has inherent limitations. Using direct estimates of body fat mass, we aimed to assess the association between C-section and adiposity using fat mass index and BMI z-score in three birth cohort studies from Pelotas, Brazil.

Methods: We measured weight, height and fat mass (using dual X-ray absorptiometry (DXA)) at ages 6, 18 and 30 years among participants in the 2004, 1993 and 1982 population-based Pelotas Birth Cohort Studies, respectively.

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