Encontrados 36 documentos, a visualizar página 1 de 4
Time-dependent decay of detectable antibodies against SARS-CoV-2: A comparison ...
Silveira,Mariangela F; Mesenburg,Marilia A; Dellagostin,Odir A; Oliveira,Natasha R de; Maia,Mara AC; Santos,Francisco D; Vale,André; Menezes,Ana M BABSTRACT Background: Large-scale epidemiological studies of seroprevalence of antibodies against SARS-CoV-2 often rely on point-of-care tests that provide immediate results to participants. Yet, little is known on how long rapid tests remain positive after the COVID-19 episode, or how much variability exists across different brands and even among batches of the same test. Methods: In November 2020, we assessed ...
COVID-19 and social distancing among children and adolescents in Brazil
Barros,Fernando C; Hartwig,Fernando P; Barros,Aluísio J D; Menezes,Ana M B; Horta,Bernardo L; Struchiner,Cláudio J; Vidaletti,Luis PauloABSTRACT OBJECTIVE To estimate the prevalence of SARS-CoV-2 antibodies and the adherence to measures of social distancing in children and adolescents studied in three national surveys conducted in Brazil between May–June 2020. METHODS Three national serological surveys were conducted in 133 sentinel cities located in all 27 Federative Units. Multistage probability sampling was used to select 250 individuals per...
Population-level seropositivity trend for SARS-Cov-2 in Rio Grande do Sul, Brazil
Barros,Aluísio J D; Victora,Cesar G; Menezes,Ana M B; Horta,Bernardo L; Barros,Fernando C; Hartwig,Fernando P; Victora,Gabriel D; Vidaletti,Luis PauloABSTRACT OBJECTIVE To describe the evolution of seropositivity in the State of Rio Grande do Sul, Brazil, through 10 consecutive surveys conducted between April 2020 and April 2021. METHODS Nine cities covering all regions of the State were studied, 500 households in each city. One resident in each household was randomly selected for testing. In survey rounds 1–8 we used the rapid WONDFO SARS-CoV-2 Antibody Tes...
Social distancing patterns in nine municipalities of Rio Grande do Sul, Brazil:...
Barros,Aluisio J D; Victora,Cesar G; Menezes,Ana M B; Horta,Bernardo L; Hartwig,Fernando; Victora,Gabriel; Pellanda,Lúcia C; Dellagostin,Odir AABSTRACT OBJECTIVE To describe social distancing practices in nine municipalities of the state of Rio Grande do Sul, Brazil, stratified by gender, age, and educational attainment. METHODS Two sequential cross-sectional studies were conducted in the municipalities of Canoas, Caxias do Sul, Ijuí, Passo Fundo, Pelotas, Porto Alegre, Santa Cruz do Sul, Santa Maria, and Uruguaiana to estimate the population prevalen...
Prevalência de nascimentos pré-termo por peso ao nascer: revisão sistemática
Silveira,Mariângela F; Matijasevich,Alicia; Horta,Bernardo L; Bettiol,Heloisa; Barbieri,Marco Antônio; Silva,Antonio A; Rondó,Patricia H COBJETIVO Estimar a prevalência de nascimentos pré-termo por faixas de peso ao nascer e obter uma equação para correção de estimativas. MÉTODOS Revisão sistemática da literatura nacional, de 1990 a 2012, para identificar estudos com coleta primária de informações sobre peso ao nascer e idade gestacional. Foram selecionados 12 que contribuíram com tabulações da prevalência de nascimentos pré-termo para faixas de ...
How many low birthweight babies in low- and middle-income countries are preterm?
Barros,Fernando C; Barros,Aluísio J D; Villar,José; Matijasevich,Alicia; Domingues,Marlos R; Victora,Cesar GOBJECTIVE: To assess the prevalence of preterm birth among low birthweight babies in low and middle-income countries. METHODS: Major databases (PubMed, LILACS, Google Scholar) were searched for studies on the prevalence of term and preterm LBW babies with field work carried out after 1990 in low- and middle-income countries. Regression methods were used to model this proportion according to LBW prevalence level...
Patterns of deliveries in a Brazilian birth cohort: almost universal cesarean s...
Barros,Aluísio J D; Santos,Iná S; Matijasevich,Alicia; Domingues,Marlos Rodrigues; Silveira,Mariângela; Barros,Fernando C; Victora,Cesar GOBJECTIVE: To describe the patterns of deliveries in a birth cohort and to compare vaginal and cesarean section deliveries. METHODS: All children born to mothers from the urban area of Pelotas, Brazil, in 2004, were recruited for a birth cohort study. Mothers were contacted and interviewed during their hospital stay when extensive information on the gestation, the birth and the newborn, along with maternal heal...
Socioeconomic inequities in the health and nutrition of children in low/middle ...
Barros,Fernando C; Victora,Cesar G; Scherpbier,Robert; Gwatkin,DavidsonOBJECTIVE: To describe the effects of social inequities on the health and nutrition of children in low and middle income countries. METHODS: We reviewed existing data on socioeconomic disparities within-countries relative to the use of services, nutritional status, morbidity, and mortality. A conceptual framework including five major hierarchical categories affecting inequities was adopted: socioeconomic contex...
Aumento da prematuridade no Brasil: revisão de estudos de base populacional
Silveira,Mariângela F; Santos,Iná S; Barros,Aluísio J D; Matijasevich,Alicia; Barros,Fernando C; Victora,Cesar GOBJETIVO: A maior causa de mortalidade infantil no Brasil são condições perinatais, associadas em sua maioria à prematuridade. O objetivo do estudo foi avaliar a evolução das taxas de prematuridade no Brasil. MÉTODOS: Foi realizada revisão nas bases de dados Medline e Lilacs, incluindo estudos publicados em periódicos, teses e dissertações, desde 1950. Os critérios de exclusão foram: estudos que se referiam a t...
Metodologia do estudo da coorte de nascimentos de 1982 a 2004-5, Pelotas, RS
Barros,Fernando C; Victora,Cesar G; Horta,Bernardo L; Gigante,Denise POBJETIVO: Descrever os métodos utilizados no estudo longitudinal e acompanhamento das crianças nascidas em Pelotas (RS) em 1982. MÉTODOS: A coorte foi iniciada com um inquérito de saúde perinatal de todas as 6.011 crianças nascidas nas maternidades de Pelotas em 1982. As 5.914 crianças nascidas vivas foram incluídas nos estudos de acompanhamento. Até 2004-5 foram realizados oito acompanhamentos, com a aplicação...