14 documents found, page 1 of 2
Prevalence of symptoms of COVID-19 in the state of Rio Grande do Sul: results o...
Mesenburg,Marilia Arndt; Hallal,Pedro Curi; Menezes,Ana Maria Baptista; Barros,Aluísio J D; Horta,Bernardo Lessa; Hartwig,Fernando Pires; Jacques,NadegeABSTRACT OBJECTIVE To evaluate the prevalence of reports of symptoms of COVID-19 among individuals with and without antibodies and identify those with greater capability to predict the presence of antibodies against SARS-CoV-2. METHODS The study uses data collected in phases 5 to 8 of Epicovid-19-RS. The presence of antibodies against SARS-CoV-2 was evaluated by a rapid test. The occurrence of cough, fever, pal...
Qualidade do Pré-Natal no Brasil: Pesquisa Nacional de Saúde 2013
Mario,Débora Nunes; Rigo,Lilian; Boclin,Karine de Lima Sírio; Malvestio,Lygia Maria Mouri; Anziliero,Deniz; Horta,Bernardo LessaResumo O objetivo deste estudo foi avaliar a adequação do cuidado pré-natal no Brasil associado a determinantes sociodemográficos. A pesquisa consistiu em uma análise dos dados da Pesquisa Nacional de Saúde realizada no Brasil em 2013. Foram avaliados dois desfechos sobre a adequação do pré-natal, o índice de Kessner modificado por Takeda que, além de levar em consideração esse índice, avaliou se houve aferição...
Lung cancer in Brazil
Araujo,Luiz Henrique; Baldotto,Clarissa; Castro Jr,Gilberto de; Katz,Artur; Ferreira,Carlos Gil; Mathias,Clarissa; Mascarenhas,EldsamiraABSTRACT Lung cancer is one of the most incident types of cancer and a leading cause of cancer mortality in Brazil. We reviewed the current status of lung cancer by searching relevant data on prevention, diagnosis, and treatment in the country. This review highlights several issues that need to be addressed, including smoking control, patient lack of awareness, late diagnosis, and disparities in the access to c...
Sampling: how to select participants in my research study?
Martínez-Mesa,Jeovany; González-Chica,David Alejandro; Duquia,Rodrigo Pereira; Bonamigo,Renan Rangel; Bastos,João LuizAbstract: Background: In this paper, the basic elements related to the selection of participants for a health research are discussed. Sample representativeness, sample frame, types of sampling, as well as the impact that non-respondents may have on results of a study are described. The whole discussion is supported by practical examples to facilitate the reader's understanding. Objective: To introduce readers t...
Test of association: which one is the most appropriate for my study?
Gonzalez-Chica,David Alejandro; Bastos,João Luiz; Duquia,Rodrigo Pereira; Bonamigo,Renan Rangel; Martínez-Mesa,JeovanyAbstractBACKGROUND:Hypothesis tests are statistical tools widely used for assessing whether or not there is an association between two or more variables. These tests provide a probability of the type 1 error (p-value), which is used to accept or reject the null study hypothesis.OBJECTIVE:To provide a practical guide to help researchers carefully select the most appropriate procedure to answer the research quest...
Presenting data in tables and charts
Duquia,Rodrigo Pereira; Bastos,João Luiz; Bonamigo,Renan Rangel; González-Chica,David Alejandro; Martínez-Mesa,JeovanyThe present paper aims to provide basic guidelines to present epidemiological data using tables and graphs in Dermatology. Although simple, the preparation of tables and graphs should follow basic recommendations, which make it much easier to understand the data under analysis and to promote accurate communication in science. Additionally, this paper deals with other basic concepts in epidemiology, such as vari...
Sample size: how many participants do I need in my research?
Martínez-Mesa,Jeovany; González-Chica,David Alejandro; Bastos,João Luiz; Bonamigo,Renan Rangel; Duquia,Rodrigo PereiraThe importance of estimating sample sizes is rarely understood by researchers, when planning a study. This paper aims to highlight the centrality of sample size estimations in health research. Examples that help in understanding the basic concepts involved in their calculation are presented. The scenarios covered are based more on the epidemiological reasoning and less on mathematical formulae. Proper calculati...
Trends in self-reported arterial hypertension in Brazilian adults: an analysis ...
Muniz,Ludmila Correa; Cascaes,Andreia Morales; Wehrmeister,Fernando César; Martínez-Mesa,Jeovany; Barros,Aluisio J. D.; Menezes,Ana Maria BaptistaThis study investigated the time trend in self-reported arterial hypertension from 1998 to 2008 in individuals older than 20 years in Brazil. Data were analyzed on prevalence of hypertension from the National Household Sample Survey (PNAD) for the years 1998, 2003, and 2008. The analysis considered the sampling complexity and included 203,419, 238,591, and 257,816 individuals in the years 1998, 2003, and 2008, ...
Periodontal disease treatment and risk of preterm birth: a systematic review an...
Rosa,Maria Inês da; Pires,Patrícia Duarte Simões; Medeiros,Lidia Rosi; Edelweiss,Maria Isabel; Martínez-Mesa,JeovanyThe events leading to preterm birth are still not completely understood. A quantitative systematic review was performed to estimate the effects of periodontal care during pregnancy on preventing preterm birth and low birth weight. The meta-analysis included randomized trials with pregnant women with a diagnosis of periodontal disease before 20 weeks of gestation. Relative risk (RR) with 95% confidence intervals...
Tendência temporal de asma em crianças e adolescentes no Brasil no período de 1...
Wehrmeister,Fernando César; Menezes,Ana Maria Baptista; Cascaes,Andreia Morales; Martínez-Mesa,Jeovany; Barros,Aluisio J DOBJETIVO: Analisar as tendências de asma em crianças e adolescentes entre 1998 e 2008 no Brasil. MÉTODOS: Foram analisados os dados de prevalência de asma da Pesquisa Nacional por Amostra de Domicílios, dos anos de 1998, 2003 e 2008. A amostra foi constituída por 141.402, 144.443 e 134.032 indivíduos em 1998, 2003 e 2008, respectivamente, e a análise foi ajustada pelo desenho amostral. As tendências de asma for...