Fração atribuível populacional: planejamento de ações de prevenção de doenças no Brasil

Epidemiology is the study of occurrence, distribution and determinants of health-related events, including the application of that knowledge to the prevention and control of health problems. However, epidemiological studies, in most cases, have limited their research questions to determinants of health outcomes. Research related to the application of knowledge for prevention and control of diseases have been neglected. In this comment, we present a description of how population attributable fraction estimates can provide important elements for planning of prevention and control of diseases in Brazil.Epidemiologia é o estudo da ocorrência, distribuição e determinantes de eventos relacionados à saúde da população, incluindo a aplicação desse conhecimento para a prevenção e o controle dos problemas de saúde. Entretanto, estudos epidemiológicos, na maioria das vezes, têm limitado suas perguntas de pesquisa aos fatores determinantes de desfechos em saúde. Pesquisas relacionadas à aplicação do conhecimento para ações de prevenção e controle de doenças têm sido negligenciadas. Nesse comentário, apresentamos uma descrição de como as estimativas de fração atribuível populacional podem fornecer importantes elementos para planejamento de ações de prevenção e controle de doenças no Brasil

Assessing screening practices among health care workers at a tertiary-care hospital in Sao Paulo, Brazil

OBJECTIVE: To ascertain the extent to which screening procedures (with and without evidence of effectiveness) are practiced among health care workers at a tertiary-care hospital in Sao Paulo, Brazil. METHODS: From February 2001 to September 2003, a cross-sectional study involving physicians, nurses and nursing assistants (aged 40 to 69 years) was carried out at a tertiary-care hospital in the city of Sao Paulo, Brazil. Subjects were interviewed using a questionnaire that addresses 17 procedures with grades of recommendation of A, B, C, D or E, in accordance with the 1996 United States Preventive Services Task Force guidelines for routine screening. RESULTS: Of the 333 health care workers included, 228 (68.5%) were female. The mean age was 48.8 (SD 6.6 years). Most subjects had undergone screening for hypertension (blood pressure measurement) and lipid abnormalities (cholesterol testing). Screening for breast and cervical cancer was common among females. Resting electrocardiography, serum glucose testing, urine tests, chest X-rays and serum prostate-specific antigen testing were also quite common. However, only 6 (1.8%) of the subjects had undergone screening for colorectal cancer (fecal occult blood test or sigmoidoscopy). CONCLUSIONS: A sizeable proportion of health care workers underwent screening procedures that are not recommended or for which there was insufficient evidence of a benefit. Conversely, certain recommended procedures were performed on a small proportion of such workers. These results indicate that the Brazilian National Ministry of Health must develop nationwide evidence-based screening recommendations and disseminate such recommendations among health care professionals in Brazil.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP

Doença de Chagas e alterações eletrocardiográficas entre trabalhadores industriais em São Paulo, Brasil

In this article, we evaluate electrocardiographic (ECG) alterations among urban workers from a mechanical-metallurgical industry in São Paulo, Brazil. In a cross-sectional survey carried out in 1980, we found 2.2% positive serological testing for Trypanosoma cruzi infection among 27,081 workers. A comparison between seropositive workers and a random sample of seronegative workers frequency-matched by age and occupation revealed that seropositive workers had a much lower educational level, and that a higher proportion of seropositive workers had ECG abnormalities (42.7%) when compared to those negative for T. cruzi infection (19.8%). The high frequency of ECG abnormalities suggests the need to provide medical assistance to these workers, without any kind of discrimination and to bring in a form of management that would decrease this dangerous risk to the workers and people around them.Neste artigo, analisamos a freqüência de alterações eletrocardiográficas (ECG) em trabalhadores de indústria mecânico-metalúrgica de São Paulo, Brasil. Num estudo transversal, conduzido em 1980, encontramos 2,2% de reações sorológicas positivas para infecção pelo Trypanosoma cruzi entre 27.081 trabalhadores. Uma comparação entre trabalhadores soropositivos e uma amostra aleatória de trabalhadores soronegativos pareados por freqüência em idade, e ocupação mostrou que os trabalhadores soropositivos apresentam menor nível de escolaridade e maior proporção de alterações ECG (42.7%) quando comparados aos soronegativos para infecção pelo T. cruzi (19.8%). A alta freqüência de alterações ECG sugere a necessidade de oferecer assistência médica para esses trabalhadores, destituída de qualquer tipo de discriminação, criando condições para diminuir os riscos para esses trabalhadores e os indivíduos próximos

Critical analyses of the introduction of liquid-based cytology in a public health service of the state of São Paulo, Brazil

OBJECTIVE The aim of this study was to compare the performance of the current conventional Pap smear with liquid-based cytology (LBC) preparations. STUDY DESIGN Women routinely undergoing their cytopathological and histopathological examinations at Fundação Oncocentro de São Paulo (FOSP) were recruited for LBC. Conventional smears were analyzed from women from other areas of the State of São Paulo with similar sociodemographic characteristics. RESULTS A total of 218,594 cases were analyzed, consisting of 206,999 conventional smears and 11,595 LBC. Among the conventional smears, 3.0% were of unsatisfactory preparation; conversely, unsatisfactory LBC preparations accounted for 0.3%. The ASC-H (atypical squamous cells - cannot exclude high-grade squamous intraepithelial lesion) frequency did not demonstrate any differences between the two methods. In contrast, the incidence of ASC-US (atypical squamous cells of undetermined significance) was almost twice as frequent between LBC and conventional smears, at 2.9 versus 1.6%, respectively. An equal percentage of high-grade squamous intraepithelial lesions were observed for the two methods, but not for low-grade squamous intraepithelial lesions, which were more significantly observed in LBC preparations than in conventional smears (2.2 vs. 0.7%). The index of positivity was importantly enhanced from 3.0% (conventional smears) to 5.7% (LBC). CONCLUSIONS LBC performed better than conventional smears, and we are truly confident that LBC can improve public health strategies aimed at reducing cervical lesions through prevention programs

Avaliação da assistência a pessoas com hipertensão arterial em Unidades de Estratégia Saúde da Família

BACKGROUND: to analyse the health care provided for people with arterial hypertension by family health strategy teams in Blumenau, state of Santa Catarina, Brazil. METHODS: overall, 595 people with arterial hypertension who live in the area of 10 family health teams were interviewed. The studied variables were: demographic and socio-economic characteristics, life style, treatment, co-morbidities, adherence to treatment, satisfaction with health service and blood pressure. Descriptive statistics and association tests (Student's t-test, ANOVA, chi-square) were used. RESULTS: the mean age was 60.6 years old. Most are female, white, married, with four or less years of formal education, unemployed, and with low social status. White people and those with high social status had more years of schooling (pOBJETIVO: analisar a assistência a pessoas com hipertensão arterial sistêmica (HAS) prestada por equipes de Estratégia Saúde da Família (ESF) em Blumenau-SC. MÉTODOS: foram entrevistadas 595 pessoas com HAS moradoras da área de 10 ESF. As variáveis estudadas foram: características demográficas e socioeconômicas, estilo de vida, tratamento, comorbidades, adesão ao tratamento, satisfação com o serviço e níveis pressóricos. Na análise, utilizaram-se os testes de "t de Student" e Qui-quadrado. RESULTADOS: a idade média foi 60,6 anos. Houve predomínio do sexo feminino, cor branca, casadas, com até quatro anos de estudo, sem trabalhar, das classes C e D. A média de escolaridade foi maior em pessoas brancas e das classes A e B (

Recent changes in trends of mortality from cervical cancer in Southeastern Brazil

OBJECTIVE: To analyze the trends of cervical cancer mortality in Brazilian Southeastern states, and to compare them to Brazil and other regions between 1980 and 2020. METHODS: Time series study based on data from the Sistema de Informações de Mortalidade (Brazilian Mortality Information System). Death data were corrected by proportional redistribution of deaths from ill-defined causes and cervical cancer of unspecified portion. Age-standardized and age-specific rates were calculated by screening target (25–39 years; 40–64 years) and non-target (65 years or older) age groups. Annual percentage changes (APC) were estimated by linear regression model with breakpoints. The coverage of Pap Smear exam in the Unified Health System (SUS) was evaluated between 2009 and 2020 according to age group and locality. RESULTS: There were increases in corrected mortality rates both in 1980 and in 2020 in all regions, with most evident increments at the beginning of the series. There was a decrease in mortality nationwide between 1980-2020; however, the state of São Paulo showed a discrete upward trend in 2014-2020 (APC=1.237; 95%CI 0.046-2.443). Noteworthy is the trend increment in the 25–39 year-old group in all study localities, being sharper in the Southeast region in 2013-2020 (APC=5.072; 95%CI 3.971-6.185). Screening coverage rates were highest in São Paulo and lowest in Rio de Janeiro, with a consistent decline from 2012 onwards at all ages. CONCLUSIONS: São Paulo is the first Brazilian state to show a reversal trend in mortality from cervical cancer. The changes in mortality patterns identified in this study point to the need for reorganization of the current screening program, which should be improved to ensure high coverage, quality, and adequate follow-up of all women with altered test results.OBJETIVO: Analisar as tendências da mortalidade por câncer de colo de útero nos estados da região Sudeste e compará-las com o Brasil e demais regiões entre 1980 e 2020. MÉTODOS: Estudo de série temporal com base nos dados do Sistema de Informações de Mortalidade. Os dados de óbito foram corrigidos por redistribuição proporcional das mortes por causas mal definidas e por câncer de útero de porção não especificada. Foram calculadas taxas padronizadas por idade e específicas por faixas etárias alvo de rastreamento (25–39 anos; 40–64 anos) e não alvo (65 anos ou mais). Variações percentuais anuais foram estimadas por modelo de regressão linear com pontos de quebra. A cobertura do exame Papanicolau no Sistema Único de Saúde (SUS) foi avaliada entre 2009 e 2020 segundo faixa etária e localidade. RESULTADOS: Foram verificados aumentos das taxas de mortalidade corrigidas tanto em 1980 como em 2020 em todas as regiões, com incrementos mais evidentes no início da série. Houve queda da mortalidade em todo o país entre 1980-2020, entretanto, o estado de São Paulo apresentou discreta tendência de aumento em 2014-2020 (APC=1,237; IC95% 0,046–2,443). Destaca-se o incremento da tendência no grupo de 25–39 anos em todas as localidades de estudo, mostrando-se mais acentuado na região Sudeste em 2013–2020 (APC=5,072; IC95% 3,971–6,185). As taxas de cobertura de rastreamento foram mais elevadas em São Paulo e mais baixas no Rio de Janeiro, com queda consistente a partir de 2012 em todas as idades. CONCLUSÕES: São Paulo é o primeiro estado brasileiro a apresentar inversão de tendência da mortalidade por câncer de colo do útero. As mudanças nos padrões de mortalidade identificadas neste estudo apontam para a necessidade de reorganização do atual programa de rastreamento, que deve ser aperfeiçoado para garantir alta cobertura, qualidade e seguimento adequado de todas as mulheres com exames alterados

A morphological protocol and guide-list on uterine cervix cytology associated to papillomavirus infection

The present study was designed to further assess the validity of the cytological description of morphological lesions said to be related to Papillomavirus (HPV) infections in senior women. The casuistic comprised 196 cervical smears from a group of women with no clinical or morphological evidence of neoplasia, collected simultaneously with samples submitted to detection of HPV DNA by PCR in a previous study. Three experienced cytologists studied each slide in two different conditions, with an interval of 20 months between them. The first approach was performed under routine laboratory standards, whereas the second was guided by a list of 16 well-defined parameters indicative of HPV-related cytological lesions. When suspicious cases of HPV-related alterations were grouped with positive cases, they showed on average: sensitivity of 25.5%, specificity of 84.4% and positive predictive value (PPV) of 26.8%. When suspicious cases were grouped with negative cases, sensitivity decreased, whereas specificity and PPV increased, as expected. In the second reading, which followed a “guide-list”, a decrease in sensitivity was observed, contrasting with a sharp increase of positive predictive value. Among the 16 cytomorphological criteria tested, “koilocytosis”, “mild koilocytosis” and “condylomatous parabasal cells” yielded the best predictive value for HPV DNA detection by PCR. In conclusion, despite the low sensitivity, cytopathologic assessment of cervico-vaginal smears leads to a highly specific diagnosis of HPV infection in menopausal women, with PPV of 91.0% when directed by a guide-list of well-defined morphologic criteria.O presente estudo analisou aspectos relacionados ao valor da citologia cervical na identificação de alterações cito-morfológicas relacionadas à infecção por Papilomavírus humano (HPV) em mulheres com idades avançadas. A casuística compreendeu 196 amostras cérvico-vaginais provenientes de uma população de mulheres sem evidências clínicas ou citológicas de neoplasia cervical. As amostras foram coletadas simultaneamente para pesquisas para DNA-HPV por Reação de Polimerização em Cadeia (PCR) e citologia. Três observadores experientes efetuaram análise das lâminas em duas etapas com intervalo de 20 meses: a primeira em condições de rotina laboratorial e a segunda dirigida por um roteiro de critérios pré-estabelecidos. Quando os casos suspeitos para alterações relacionadas ao HPV foram agrupados com os casos positivos, eles mostraram em média: 25,5% de sensibilidade, 84,4% de especificidade e valor preditivo positivo (VPP) de 26,8%. Quando os casos suspeitos foram agrupados com os negativos, a sensibilidade diminuiu, e a especificidade e o VPP aumentaram. Na segunda leitura, a sensibilidade diminuiu, contrastando com o aumento do VPP. Entre os 16 critérios cito-morfológicos avaliados, coilocitose, coilocitose leve e célula parabasal coilocitótica foram os que apresentaram melhor VPP para HPV em comparação ao PCR. Concluímos que, apesar da baixa sensibilidade, o painel de critérios cito-morfológicos poderá elevar a especificidade do teste de Papanicolaou para triagem das alterações relacionadas à infecção por HPV em pacientes de mais idade

Preventable fractions of colon and breast cancers by increasing physical activity in Brazil: perspectives from plausible counterfactual scenarios

Background: Physical activity is associated with lower risk of colon and breast cancers. Herein we estimated preventable fractions of colon and breast cancers in Brazil by increasing population-wide physical activity to different counterfactual scenarios. Methods: We used data from a representative national survey in Brazil and corresponding relative risks of colon and postmenopausal breast cancers from a meta-analysis. Estimated cancer incidence was retrieved from GLOBOCAN and Brazilian National Cancer Institute. Five counterfactual scenarios for physical activity were considered: (i) theoretical minimum risk exposure level (≥8,000 metabolic equivalent of tasks-minute/week – MET-min/week); (ii) physical activity recommendation (≥600 MET-min/week); (iii) a 10% reduction in prevalence of insufficient physical inactivity (<600 MET-min/week); (iv) physical activity level in each state equals the most active state in Brazil; (v) closing the gender differences in physical activity. Results: About 19% (3,630 cases) of colon cancers and 12% (6,712 cases) of postmenopausal breast cancers could be prevented by increasing physical activity to ≥8,000 MET-min/week. Plausible counterfactual scenarios suggested the following impact on cancer prevention: reaching physical activity recommendation: 1.3% (1,113 cases) of breast and 6% (1,137 cases) of colon; 10% reduction in physical inactivity prevalence: 0.2% (111 cases) of breast and 0.6% (114 cases) of colon; most active state scenario: 0.3% (168 cases) of breast and 1% (189 cases) of colon; reducing gender differences in physical activity: 1.1% (384 cases) of breast and 0.6% (122 cases) of colon. Conclusions: High levels of physical activity are required to achieve sizable impact on breast and colon cancer prevention in Brazil

Saúde bucal, práticas de higiene bucal e ocorrência de câncer da cavidade oral

OBJECTIVE: To assess the association between oral health and hygiene practices and oral cancer. METHODS: Hospital-based case-control study in the metropolitan area of São Paulo, southeastern Brazil, from 1998 to 2002. A total 309 patients with squamous cell carcinoma of the mouth and the pharynx and 468 controls matched by sex and age were included in the study. Cases were recruited in seven reference hospitals and controls were selected in five out of the seven participating hospitals. Detailed information on smoking, alcohol consumption, schooling, oral health status and hygiene practices were obtained through interviews. Odds ratios (OR) and 95% confidence intervals (95% CI), adjusted by sex, age, schooling, smoking, alcohol consumption as well as the variables oral health status and hygiene practices were estimated using unconditional logistic regression analyses. RESULTS: The use of complete dental prosthesis was not associated with oral cancer but regular gum bleeding showed a strong association (OR 3.1; 95% CI 1.2-7.9). Those who never attended a dental visit were more likely to have oral cancer (OR 2.5; 95% CI 1.3-4.8). Daily mouthwash use showed a stronger association to pharynx (OR 4.7; 95% CI 1.8-12.5) than mouth cancer (OR 3.2; 95% CI 1.6-6.3). CONCLUSIONS: Gum bleeding, no dental care, and daily mouthwash use were factors associated with oral cancer regardless of tobacco and alcohol consumption.OBJETIVO: Avaliar a associação entre saúde e higiene bucal na ocorrência de câncer oral. MÉTODOS: Estudo caso-controle de base hospitalar, realizado entre 1998 e 2002 na área metropolitana de São Paulo, SP. Foram incluídos 309 pacientes com carcinoma epidermóide de boca e orofaringe e 468 controles, pareados com os casos por sexo e idade. Os casos foram levantados em sete hospitais que concentram a assistência médica a pacientes com a doença e os controles rastreados em cinco hospitais gerais dentre os sete. Informações pormenorizadas sobre tabagismo, consumo de álcool, escolaridade, saúde bucal e práticas de higiene bucal foram obtidas por entrevista. Por meio de análise de regressão logística não condicional foram calculados odds ratios (OR) e intervalos com 95% de confiança (IC 95%), ajustados por sexo, idade, nível educacional, tabagismo e consumo de álcool, bem como para as demais variáveis de saúde e higiene bucal. RESULTADOS: Uso de prótese bucal total não se associou a câncer oral, mas sangramento gengival freqüente apresentou alta associação (OR=3,1; IC 95%: 1,2;7,9). Nunca ter consultado dentista mostrou associação com câncer oral (OR=2,5; IC 95%: 1,3;4,8). Uso diário de enxaguatórios bucais apresentou associação mais intensa com tumores de faringe (OR=4,7; IC 95%: 1,8;12,5) do que com tumores de boca (OR=3,2; IC 95%: 1,6;6,3). CONCLUSÕES: Sangramento gengival, ausência de consultas com dentistas e uso regular de enxaguatórios bucais foram fatores associados com câncer oral, independentemente de tabagismo e consumo de bebidas alcoólicas.European Commission ContractFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP