Protocol for an ambidirectional cohort study on long COVID and the healthcare needs, use and barriers to access health services in a large city in Southeast Brazil.

Introduction: Post-COVID-19 condition, or syndrome, also known as long COVID, is an infection-associated chronic condition that can develop after a SARS-CoV-2 infection and last at least 3 months to years. Despite representing a high burden for the Unified Health System (SUS), which has affected millions of Brazilians, it has received limited attention in Brazil. Prevalence studies to date have failed to include a broad representation of the population, and there has been insufficient exploration of the impact on people's lives and the burden of and barriers to accessing health services.

National Vaccine Coverage Survey 2020: methods and operational aspects.

Objective: The national vaccination coverage survey on full vaccination at 12 and 24 months of age was carried out to investigate drops in coverage as of 2016.

Methods: A sample of 37,836 live births from the 2017 or 2018 cohorts living in capital cities, the Federal District, and 12 inner cities with 100 thousand inhabitants were followed for the first 24 months through vaccine record cards. Census tracts stratified according to socioeconomic levels had the same number of children included in each stratum.

General methodological aspects in the Brazilian National Survey on Child Nutrition (ENANI-2019): a population-based household survey.

This article aims to present general methodological aspects of the Brazilian National Survey on Child Nutrition (ENANI-2019), from the conception of the study design to details of the data collection. This is a household-based population survey with a sample calculated at 15,000 households to identify children under five years of age, conducted in 123 municipalities in Brazil's 26 states and the Federal District. ENANI-2019 includes data on breastfeeding and dietary intake; anthropometric nutritional status of all children and their biological mothers; and nutritional status concerning the following micronutrients: iron (hemoglobin and ferritin), zinc, selenium, and vitamins A, B1, B6, B12, D, E, and folic acid of children from 6 to 59 months of age.

Sampling plan of the Brazilian National Survey on Child Nutrition (ENANI-2019): a population-based household survey.

The article describes methodological aspects in defining the study population, sampling plan, and sample weigthing and calibration of effective sample of the Brazilian National Survey on Child Nutrition (ENANI-2019). This population-based household survey assessed breastfeeding and dietary intake, anthropometric assessment of nutritional status, and micronutrient deficiencies by blood biomarkers in children under five years of age. The data were obtained with a probability sample, with stratification by the five geographic regions in the country and clustering by census enumeration areas (CEAs).

Polysubstance use in a Brazilian national sample: Correlates of co-use of alcohol and prescription drugs.

: Responses to problem substance use have largely focused on illicit drugs, but reports on rising prescription drug misuse worldwide raise questions about their combined use with alcohol and potential consequences. The current study assessed prevalence of alcohol in conjunction with nonmedical opioid and benzodiazepine use across a nationally representative sample of adults in Brazil. Cross-sectional data on prevalence were estimated from the 2015 Brazilian Household Survey on Substance Use.

Prevalence of polypharmacy and associated factors in older adults living in Rio Branco, Acre, Brazil: a cross-sectional population-based study, 2014.

Objective: To analyze polypharmacy prevalence and associated factors in older adults living in Rio Branco, Acre, Brazil, in 2014.

Methods: This was a cross-sectional population-based study using complex sampling with older adults. Polypharmacy was defined as concomitant use of five or more medications.

[Chronic kidney disease among adults in Rio Branco, State of Acre: a population-based survey].

The scope of this study was to establish the prevalence of CKD and associated factors among young adults (18-59 years of age) from Rio Branco in the State of Acre. It involved a population-based survey conducted in 2014, in the urban and rural areas of the municipality and CKD was defined as the glomerular filtration rate (GFR) < 60ml/min/1.73m², estimated by the CKD-EPI, and the presence of albuminuria > 29 mg/g.

ELSI-COVID-19 initiative: methodology of the telephone survey on coronavirus in the Brazilian Longitudinal Study of Aging.

The COVID-19 pandemic (caused by the SARS-CoV-2) is a public health emergency of international concern that particularly affects older people. Brazil is one of the countries most affected by the pandemic, ranking second with the highest number of confirmed cases and deaths worldwide as of mid-June 2020. The ELSI-COVID-19 initiative is based on telephone interviews with participants of the Brazilian Longitudinal Study of Aging (ELSI-Brazil), conducted on a nationally representative sample of the population aged 50 or older.

Substance use, self-rated health and HIV status in Brazil.

We compared the prevalence of of non-injecting drug use (NIDU) and Self-Rated Health (SRH) among individuals self-reporting as HIV-positive (PLWHA), HIV-negative and unknown at the III Brazilian Household Survey on Substance Use. Overall, 16,273 individuals, 12-65 years old, were interviewed in 2015. Prevalence and Standard Error (SE) were estimated considering the complex sample design and weight calibration.

Factors associated with low handgrip strength in older people: data of the Study of Chronic Diseases (Edoc-I).

Background: Handgrip strength (HGS) is an important health biomarker whose low scores have been shown to be associated with the morbimortality. This study aimed to analyze the factors associated with low HGS in older people in Rio Branco, Acre, Brazil.

Methods: The study was carried out with data from the Study of Chronic Diseases (EDOC-I) - Older People, a cross-sectional household PAPI probability sample survey performed with 1016 people aged over 60 residing in Rio Branco in 2014.

Relationship between anthropometric indicators and risk factors for cardiovascular disease in adults and older adults of Rio Branco, Acre.

Objective: To analyze the association between anthropometric variables and cardiovascular risk factors in adults and older adults of Rio Branco, Acre.

Methods: A population-based cross-sectional study with 641 adults and 957 older adults was conducted. The statistical analyses consisted of the distribution of anthropometric variables according to the cardiovascular risk factors by frequency and dispersion measures.

Study protocol of personal characteristics and socio-cultural factors associated with mental health and quality of life of residents living in violent territories.

Background: Throughout the world, millions of people living in deprived urban environments with frequent experiences of violence are mentally distressed. There is little evidence about which characteristics of people living in such environments are associated with lower or higher levels of mental distress and how they may cope with experiences of violence.

Methods/design: This study is part of the research project 'Building the Barricades' (ES/S000720/1 ESRC-AHRC GCRF Mental Health 2017), which uses a mixed-method approach.

[On the crisis: meanings and perspectives. Interview with Marco Américo Lucchesi].

In this interview, Marco Américo Lucchesi, Tenured Professor of Comparative Literature at the Federal University of Rio de Janeiro (UFRJ), visiting professor of the Oswaldo Cruz Foundation (Fiocruz), and member and president of the Brazilian Academy of Letters, outlines his perception of the current crisis and the impact on the consolidation of Brazilian democracy. Based on his experiences as a critic and intellectual, he comments on the attacks on culture and the production of knowledge that we have witnessed in Brazil. He reminds us that no democracy is a fully-fledged ontological reality and highlights the role of schools and universities in mobilizing citizenship and spreading republican values.

Accuracy of self-reported systemic arterial hypertension in adults, Rio Branco, Acre, Brazil.

Objective: to analyze the validity of self-reported systemic arterial hypertension (SAH) in the adult population of Rio Branco, Acre, Brazil.

Methods: this was a study of diagnostic accuracy with 576 adults aged 18 to 59 years; accuracy, sensitivity, specificity and positive and negative predictive values were calculated in order to build the Receiver Operating Characteristic (ROC) curve.

Results: the prevalence rates of measured SAH (gold standard) and self-reported SAH were 19.

Reproducibility on science: Challenges and advances in Brazilian alcohol surveys.

Background: Reproducibility in Science is challenging and may be hard to achieve in alcohol research. Previous general population surveys in Brazil have estimated the prevalence of alcohol dependence to be around 10%. We aim to estimate alcohol use and dependence using different methods and definitions.

Factors associated with PrEP awareness according to age and willingness to use HIV prevention technologies: the 2017 online survey among MSM in Brazil.

Brazil has the largest population of individuals living with HIV/AIDS in Latin America with a disproportional prevalence of infection among men who have sex with men (MSM). This study evaluated PrEP awareness by age (18-24, 25-35, ≥36 years), its associated factors and the willingness to use HIV prevention technologies among MSM using a GSN app in Brazil. Inclusion criteria were ≥18 years-old, cisgender men and HIV-negative serostatus.

Prevalence and factors associated to chronic kidney disease in older adults.

Objective: To verify the prevalence of chronic kidney disease and the factors associated to it in older adults (≥ 60 years).

Methods: This is a population-based research conducted in 2014, involving 1,016 older adults living in urban and rural areas of the municipality of Rio Branco, Acre. Chronic kidney disease was defined by glomerular filtration rate < 60 ml/min/1.

Study of Chronic Diseases (Edoc): methodological aspects.

Objective: Describe the sampling design and other methodological aspects of the Study of Chronic Diseases (Edoc).

Methods: Edoc comprises two household surveys with distinct populations, one with adults aged 18 to 59 years (Edoc-A) and another with older adults aged 60 years or more (Edoc-I), living in Rio Branco, Acre. The selection of the participants used complex samples by clusters in two stages of selection, census enumeration areas (CEA) and household.

Hand grip strength: Reference values for adults and elderly people of Rio Branco, Acre, Brazil.

Hand grip strength (HGS) is recognized as an important health indicator, but validated reference values that can be applied to the evaluation of individuals in different populations are still lacking. This work aimed to identify correlations between HGS and anthropometric variables and to establish HGS reference values for adult and elderly populations. This is a population-based cross-sectional study considering the subsets of individuals with healthy right or left upper limbs from a sample of 1,609 adults and elderly residents in Rio Branco, Acre, Brazil.

Syndemics among individuals enrolled in the PrEP Brasil Study.

Background: Concurrent psychosocial problems may synergistically increase the risk of HIV infection (syndemics), representing a challenge for prevention. We aimed to evaluate the prevalence and associated factors of syndemics among men who have sex with men (MSM) and transgender women (TGW) enrolled in the Brazilian pre-exposure prophylaxis demonstration study (PrEP Brasil Study).

Methods: Secondary cross-sectional analysis of the PrEP Brasil Study was performed.

Mind the gap: implementation challenges break the link between HIV/AIDS research and practice.

Sampling strategies such as respondent-driven sampling (RDS) and time-location sampling (TLS) offer unique opportunities to access key populations such as men who have sex with men (MSM) and transgender women. Limited work has assessed implementation challenges of these methods. Overcoming implementation challenges can improve research quality and increase uptake of HIV services among key populations.

Health care factors associated with survival among women with breast cancer on hormone therapy in Rio de Janeiro, Brazil, 2004 - 2010.

Objectives To better understand the role that health care plays in breast cancer survival by investigating the effects that hormone therapy adherence and other select health care variables, adjusted for clinical and sociodemographic factors, had among a population of women in Rio de Janeiro, Brazil. Methods This was a longitudinal study based on secondary data of 5 861 women treated with hormone therapy (tamoxifen or aromatase inhibitors) at the National Cancer Institute of Brazil (INCA), from 1 January 2004 - 29 October 2010. Four different sources of data were integrated for analysis: INCA Pharmacy Sector Dispensation System; Hospital-based Cancer Registry; Integrated Hospital System and INCA Absolute System; and Mortality Information System.