(Not) Learning to teach mathematics

In Brazil, future pre- and primary school teachers are educated in a 4-year undergraduate program called “Pedagogy”. In the Faculty of Education at the University of X, the present curriculum of the Pedagogy program started in the year 2001 and it included a much stronger focus than the previous curriculum on preparing Student Teachers (STs) to perform research. Eight new compulsory Research-Based Project Course Components (RBPCCs) were included. This study presents some preliminary findings concerning the STs’ experiences about the 2001 curriculum and how it has contributed to becoming primary school (mathematics) teachers.Peer reviewe

AS RELAÇÕES ENTRE O REINO DO CONGO E O BRASIL HOLANDÊS NO SÉCULO XVII: O COMÉRCIO DE ESCRAVOS E A COMPANHIA DAS ÍNDIAS OCIDENTAIS

O objetivo do presente trabalho é fazer uma análise bibliográfica e historiográficadas relações entre o Reino do Congo e o Brasil holandês no século XVII, dandoenfoque ao comércio de escravos. O método utilizado é o qualitativo a partir derevisões bibliográficas. É discutida a inserção do Reino do Congo no mundoatlântico a partir da sua aproximação com os portugueses, o início da suaparticipação no comércio de escravos, o seu afastamento dos portugueses e suaeventual aproximação com os holandeses, que se destacavam no mundo atlânticodevido às suas avançadas técnicas navais. Nesse contexto, o século XVII é vistocomo o ápice econômico do tráfico de humanos entre o Congo e o Brasil holandês.Todavia, o tráfico traz consequências negativas para ambos os lados, e devido àsdisputas pelo trono e guerras civis no Reino do Congo e à má gestão da Companhiadas Índias Ocidentais e da colônia holandesa no nordeste Brasileiro, o Reino doCongo termina fragmentado e a Companhia das Índias Ocidentais vai à falência,mudando o rumo de ambos os atores. No século seguinte, vemos as consequênciasdiretas dos anos de atuação no comércio de escravos: os reinos que uma vezpertenceram ao Reino do Congo estão enfraquecidos e a Companhia das ÍndiasOcidentais se volta para o Caribe em uma tentativa de continuar atuando nocomércio de escravos. Concluímos que marcas da escravidão perduram nos paísesque mais atuaram no comércio de escravos até a atualidade

Desigualdades sociais entre vizinhanças e doenças cardiovasculares: Análise multinível em uma cidade latino-americana

Studies analyzing relations between cardiovascular diseases (CVDs) and environmental aspects in Latin American cities are relatively recent and limited, since most of them are conducted in high-income countries, analyzing mortality outcomes, and comprising large areas. This research focuses on adults with diabetes and/ or hypertension under clinical follow-up who live in deprived areas. At the individual level we evaluated sociodemographic and cardiovascular risk factors from patient’s records, and at the neighborhood level, socioeconomic conditions from census data. A multilevel analysis was carried out to study CVD. More women than men were under clinical follow-up, but men had higher frequency, higher odds, and shorter time to CVD diagnosis. Multilevel analysis showed that residing in neighborhoods with worst socioeconomic conditions leads to higher odds of CVDs, even after controlling for individual variables: OR (CI95%) of CVD in quartile 2 (Q2) 3.9 (1.2-12.1); Q3 4.0 (1.3-12.3); Q4 2.3 (0.7-8.0) (vs. highest socioeconomic level quartile). Among individuals living in unequal contexts, we found differences in CVD, which makes visible inequalities within inequalities. Differences between women and men should be considered through a gender perspective.Os estudos que analisam as relações entre doenças cardiovasculares (DCVs) e aspectos ambientais em cidades latino-americanas são relativamente recentes e limitados. A maioria é realizada em países de alta renda analisando a mortalidade em grandes áreas. Esta investigação foca a população de adultos em acompanhamento clínico por diabetes e/ou hipertensão residentes em áreas carentes. No nível individual foram avaliados fatores sociodemográficos e de risco cardiovascular a partir dos prontuários médicos; e a partir de dados censitários, as condições socioeconômicas no nível da vizinhança. Mais mulheres do que homens estavam sob acompanhamento clínico, mas os homens apresentaram maior frequência, maior chance e menor tempo para diagnóstico de DCV. A análise multinível mostrou que residir em bairros com piores condições socioeconômicas leva a maiores chances de DCV, mesmo após o controle de variáveis individuais. As OR (IC95%) de DCV foram: Q2 OR 3,9 (1,2-12,1); Q3 OR 4,0 (1,3-12,3); Q4 OR 2,3 (0,7-8,0) (referência: quartil de maior nível socioeconômico). Entre os indivíduos que vivem em contextos desiguais, encontramos diferenças nas DCV, mostrando desigualdades dentro das desigualdades. Diferenças entre homens e mulheres devem ser abordadas com uma perspectiva de gênero.Fil: Perner, Mónica Serena. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Lanús. Rectorado. Instituto de Salud Colectiva; ArgentinaFil: Alazraqui, Marcio. Universidad Nacional de Lanús. Rectorado. Instituto de Salud Colectiva; ArgentinaFil: Amorim, Leila D. Universidade Federal da Bahia; Brasi

Choosing the right strategy to model longitudinal count data in Epidemiology: An application with CD4 cell counts

Background: Statistical models for analysis of correlated count data are important for answering epidemiological questions that involve taking individual count measurements repeatedly over time through the use of longitudinal studies. Conventional regression models for this type of data are inadequate, leading to improper conclusions and inference. An important application of longitudinal studies in Public Health is the evaluation and monitoring of patients with infectious diseases, such as HIV/AIDS, to determine their health status, to verify the treatment effects, and to make prognosis concerning the evolution of the disease, including interdependencies of clinical manifestations. The purpose of this article is to characterize different statistical strategies for analysis of longitudinal count data, emphasizing how to choose the most suitable model for the data and how to interpret the results. Methods:We illustrate their applicability by evaluating the effect of associated factors on lymphocyte CD4+T cell count in HIV seropositive patients in Salvador/Bahia - Brazil. We describe Poisson and Negative Binomial models using multilevel (ML) approach and generalized estimations equations (GEE) for analysis of longitudinal count data. Results: It is worth noting that the interpretation of the results from ML and GEE differs and they should not be compared directly. Conclusion: We believe that the statistical methodology for analysis of longitudinal studies with correlated count data can be useful to address several important questions in public health, particularly by helping to monitor patients and checking the effectiveness of treatments

Modelling recurrent events: a tutorial for analysis in epidemiology

In many biomedical studies, the event of interest can occur more than once in a participant. These events are termed recurrent events. However, the majority of analyses focus only on time to the first event, ignoring the subsequent events. Several statistical models have been proposed for analysing multiple events. In this paper we explore and illustrate several modelling techniques for analysis of recurrent time-to-event data, including conditional models for multivariate survival data (AG, PWP-TT and PWP-GT), marginal means/rates models, frailty and multi-state models. We also provide a tutorial for analysing such type of data, with three widely used statistical software programmes. Different approaches and software are illustrated using data from a bladder cancer project and from a study on lower respiratory tract infection in children in Brazil. Finally, we make recommendations for modelling strategy selection for analysis of recurrent event data

Relationship between oral health and its impact on quality of life among adolescents

The aim of this study was to assess oral health status and its relationship with quality of life. A household population, cross-sectional study was carried out; participants were between 15 and 17 years of age (n = 247) and were examined by two calibrated dentists. Socio-economic status was classified according to ANEP-ABIPEME criteria. Clinical examinations to observe DMFT, CPI and Dean indices were performed as per WHO criteria. The Significant Caries Index (SiC) was used to evaluate polarization of the occurrence of caries among participants of the tercile with higher DMF-T. The OHIP instrument was used to measure quality of life. The Spearman and Mann-Whitney tests were used for assessing correlations (5% significance level). Examinations were carried out in 117 (47.37%) females and in 130 (52.63%) males. Of the examined participants, 45.75% were classified as belonging to socio-economic class C. Caries occurrence was observed in 218 subjects (88.26%); the mean DMFT was 5.40. The SiC index was 9.97. Almost half (47.77%) of the participants examined did not present sextants affected by periodontal disease. Of the participants examined, 80.16% presented absence of fluorosis. The mean OHIP was 3.95. The following correlations were observed: a positive and statistically significant correlation between the highest score in the OHIP and decayed teeth; a positive correlation with threshold significance between OHIP and DMFT; an inverse correlation between intact teeth and OHIP; and a positive and non statistically significant correlation between SiC and OHIP (correlation coefficient = 0.13, p = 0.245). Association between the mean OHIP and the terciles was not significant (p = 0.146); there were also no associations between periodontal condition and OHIP nor were there associations between the presence of fluorosis and mean OHIP

Mammography in asymptomatic women aged 40-49 years

OBJECTIVE To assess findings of mammography of and interventions resulting from breast cancer screening in women aged 40-49 years with no increased risk (typical risk) of breast cancer. METHODS This cross-sectional study evaluated women aged 40-49 years who underwent mammography screening in a mastology reference center in Recife, PE, Northeastern Brazil, between January 2010 and October 2011. Women with breast-related complaints, positive findings in the physical examination, or high risk of breast cancer were excluded. RESULTS The 1,000 mammograms performed were classified into the following Breast Imaging-Reporting and Data System (BI-RADS) categories BI-RADS 0, 232; BI-RADS 1, 294; BI-RADS 2, 294; BI-RADS 3, 16; BI-RADS 4A, 2; BI-RADS 5, 1. There was one case of grade II invasive ductal carcinoma and various interventions, including 469 ultrasound scans, 53 referrals to mastologists, 11 cytological examinations, and 8 biopsies. CONCLUSIONS Mammography screening in women aged 40-49 years with typical risk of breast cancer led to the performance of other interventions. However, it also resulted in increased costs without demonstrable efficacy in decreasing mortality.OBJETIVO Avaliar os achados mamográficos e as intervenções decorrentes do rastreamento em mulheres de 40 a 49 anos de idade com risco habitual para o câncer de mama. MÉTODOS Estudo transversal com mulheres de 40 a 49 anos, submetidas ao rastreamento mamográfico em centro de referência em mastologia, em Recife, PE, de janeiro de 2010 a outubro de 2011. Foram excluídas mulheres com queixas mamárias, alterações no exame físico e com alto risco para câncer de mama. RESULTADOS Das 1.000 mamografias realizadas, 232 foram BI-RADS 0, 454 BI-RADS 1, 294 BI-RADS 2, 16 BI-RADS 3, duas BI-RADS 4A, uma BI-RADS 4C e uma BI-RADS 5. Observou-se um único caso de carcinoma ductal invasivo grau II e várias intervenções: 469 ultrassonografias, 53 encaminhamentos para a mastologia, 11 citologias e oito biópsias. CONCLUSÕES O rastreamento mamográfico em mulheres de 40 a 49 anos com risco habitual para o câncer de mama leva a outras intervenções e, assim, ao aumento dos custos com eficácia não mostrada para redução da mortalidade

Safety culture in the perception of public-hospital health professionals

OBJETIVO Avaliar a cultura de segurança na percepção dos profissionais que trabalham nos hospitais públicos do Sistema Único de Saúde (SUS) do Distrito Federal, Brasil, três anos após a implantação do Programa Nacional de Segurança do Paciente (PNSP). MÉTODOS estudo transversal analítico realizado em onze hospitais públicos por meio do Safety Attitudes Questionnaire em formato eletrônico. A amostragem estratificada foi calculada, obedecendo à proporção do total de profissionais em cada hospital, assim como a representatividade de cada grupo profissional. Os resultados do escore total e dos domínios iguais ou maiores que 75 foram considerados positivos. Realizadas análises descritivas e inferenciais dos grupos profissionais e dos hospitais. RESULTADOS Participaram 909 profissionais. O escore total por grupo profissional foi negativo (62,5 a 69,5) e por domínio diferiram estatisticamente entre si em todos. Os onze hospitais tiveram escore total negativo (61,5 a 68,6). Os domínios com desempenho positivo foram satisfação no trabalho, percepção do estresse e clima de trabalho em equipe. Os resultados mais baixos foram condições de trabalho e percepção da gerência, e nenhum dos hospitais obteve média superior à 75 nesses domínios. Também foram encontradas diferenças nas médias dos domínios entre os hospitais, exceto em percepção da gerência. DISCUSSÃO Após três anos de implantação no PNSP, a cultura de segurança nos onze hospitais avaliados se mostrou fragilizada, embora os domínios satisfação no trabalho, percepção do estresse e clima de trabalho em equipe tiveram resultados positivos. Os resultados podem contribuir para a tomada de decisão dos gestores, pois a cultura de segurança é um elemento essencial na implementação da política de segurança do paciente.OBJECTIVE Evaluating safety culture in the perception of professionals working in public hospitals of the Unified Health System (SUS) of Distrito Federal, Brazil, three years after the implementation of the National Patient Safety Program (PNSP). METHODS Analytical cross-sectional study conducted in eleven public hospitals using the Safety Attitudes Questionnaire (SAQ) in electronic format. Stratified sampling was estimated according to the proportion of the total number of professionals in each hospital, as well as the representativeness of each professional group. The results of the total score and domains equal to or greater than 75 were considered positive. Descriptive and inferential analyses of professional groups and hospitals were carried out. RESULTS 909 professionals participated. The total score by professional group was negative (62.5 to 69.5) and the domains differed statistically in all cases. The eleven hospitals had a negative total score (61.5 to 68.6). The domains to attain positive performance were job satisfaction, stress recognition and teamwork climate. The lowest results were in working conditions and management perception domains, for which none of the hospitals had an average above 75. Differences were also found for domain means across hospitals, except in management perception. DISCUSSION Three years after the implementation of PNSP, the safety culture in eleven hospitals evaluated was weak, although the domains of job satisfaction, stress recognition and teamwork climate had positive results. The results can contribute to decision-making by managers, as safety culture is an essential element in the implementation of patient safety policy

Prótese sobre implantes: cimentada versus parafusada

Este estudo foi uma revisão de literatura que aborda uma discussão sobre o polêmico ponto: prótese implantossuportada cimentada versus prótese implantossuportada parafusada, baseado em quesitos, como vantagens, desvantagens e indicações e abordando temas como facilidade de fabricação, passividade, custo, estética, retenção, distribuição de tensões e remoção. Os dados levantados foram artigos publicados durante os anos de 1993 a 2008 na Literatura Internacional em Ciências da Saúde (Medline), Literatura Latino-Americana e do Caribe em Ciências da Saúde (Lilaes) e no Scientific Electronic Library Online (Scielo). A escolha entre prótese implantossuportada parafusada e prótese implantossupotada cimentada pode ser interesse pessoal do profissional ou do paciente, ou didaticamente por situações clínicas específicas, pois ambos os modelos apresentam vantagens, desvantagens e limitações que devem ser respeitadas para o sucesso do tratamento.Palavras-chave: Prótese parcial fixa. Implante. Cimentação.