RESUMO
Assuntos
Neoplasias da Mama/diagnóstico , Neoplasias da Mama/epidemiologia , Neoplasias da Mama/patologia , Comportamentos Relacionados com a Saúde , Programas de Rastreamento , Programas Nacionais de Saúde , Carga Tumoral , Idoso , Neoplasias da Mama/diagnóstico por imagem , Progressão da Doença , Feminino , França/epidemiologia , Humanos , Mamografia/métodos , Mamografia/estatística & dados numéricos , Programas de Rastreamento/métodos , Programas de Rastreamento/organização & administração , Pessoa de Meia-Idade , Programas Nacionais de Saúde/organização & administração , Invasividade Neoplásica , Prognóstico , Fatores SocioeconômicosRESUMO
OBJECTIVES: The high incidence of female breast cancer that has been consistently reported in urban areas could be mediated by breast density, which is considered to reflect the cumulative exposure of breast tissues to hormones. The aim of this study was to assess how mammographic density varies by the degree of urbanization. SETTING: The population consisted of 55,597 cancer-free women, aged 50-59 years, who participated in a French breast cancer screening programme (Franche-Comté region) between 2005 and 2009. METHODS: Ordered logistic regression was run with mammographic density as the outcome, and degree of urbanization as the independent variable, while adjusting for some known confounding factors. Multiple imputation was used to deal with missing data. RESULTS: A significant positive linear trend with urbanization was found in a univariate approach (P trend <10(-3)), and after adjusting for risk factors (P trend = 10(-3)). A negative and highly significant association with mammographic density was highlighted both for age at the time of mammography (odds ratio (OR) 0.41, 95% confidence interval (CI) 0.39-0.43, per 10 years), and for low socioeconomic status (OR 0.71, 95% CI 0.67-0.75). The OR for hormone replacement therapy use was 1.51 (95% CI 1.43-1.58). CONCLUSIONS: Knowledge of this urbanization gradient in density (whatever its mechanism) may help to identify women who may require full-field digital mammography for the early detection of breast cancer, and could assist primary care providers in recommending the best screening strategy in a risk factor-based approach.
Assuntos
Neoplasias da Mama/diagnóstico por imagem , Carcinoma/diagnóstico por imagem , Acessibilidade aos Serviços de Saúde/estatística & dados numéricos , Mamografia/estatística & dados numéricos , Programas de Rastreamento/estatística & dados numéricos , Urbanização , Algoritmos , Neoplasias da Mama/epidemiologia , Neoplasias da Mama/etiologia , Carcinoma/epidemiologia , Carcinoma/etiologia , Demografia/estatística & dados numéricos , Detecção Precoce de Câncer/métodos , Detecção Precoce de Câncer/estatística & dados numéricos , Feminino , França/epidemiologia , Humanos , Pessoa de Meia-Idade , Densidade Demográfica , Fatores de Risco , População Rural/estatística & dados numéricos , População Urbana/estatística & dados numéricos , Urbanização/tendênciasRESUMO
BACKGROUND: The long tenure of the Doubs cancer registry (France) and the late implementation of a mass screening program provide a unique opportunity to assess the relative contributions of age, period and cohort effects to the increase in female invasive breast cancer incidence, while avoiding the influence of an organized screening program. METHODS: Population and incidence data were provided for the Doubs region during the 1978-2003 period. Breast cancer counts and person-years were tabulated into 1-year classes by age and time period. Age-period-cohort models with parametric smooth functions were fitted to the data, assuming a Poisson distribution for the number of observed cases. RESULTS: A total of 5688 incident cases of invasive breast cancer in women were diagnosed in women aged 30-84 years in the Doubs region between 1978 and 2003. The annual percentage increase in incidence is 2.09%. Age effects rise dramatically until age 50, and at a slower pace afterwards. Large cohort curvature effects (p<10(-6)), show departure from linear trends, with a significant peak for women born around 1940. Period curvature effects are lower in magnitude (p=0.01). CONCLUSION: Both cohort and period effects are involved in the marked increase in breast cancer incidence over a 25-year period in the Doubs region. Although the future trend for breast cancer incidence is difficult to predict, the introduction of an organized screening program, and the sharp decline in hormone replacement therapy use will likely contribute to period effects in future analyses.
Assuntos
Neoplasias da Mama/epidemiologia , Adulto , Distribuição por Idade , Idoso , Idoso de 80 Anos ou mais , Estudos de Coortes , Detecção Precoce de Câncer , Feminino , França/epidemiologia , Humanos , Incidência , Mamografia , Pessoa de Meia-Idade , Sistema de RegistrosRESUMO
We evaluated the usefulness of adding weekly methicillin-resistant Staphylococcus aureus (MRSA) screening to our established admission screening and clinical sampling in 4 acute care units of a university hospital. Our results suggest that weekly MRSA screening allows the detection of 56.1% of all cases of hospital-acquired MRSA carriage. These cases would have remained undetected had admission screening and clinical sampling been the only types of surveillance in place.