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BACKGROUND This paper reports population-based data on the prevalence and causes of visual impairment among children and adults in Botucatu, Brazil. METHODS A population-based cross-sectional study was conducted involving a random start point and then systematic sampling of an urban Brazilian population in the city of Botucatu. There were approximately(More)
BACKGROUND Many factors have been associated with circulation of the dengue fever virus and vector, although the dynamics of transmission are not yet fully understood. The aim of this work is to estimate the spatial distribution of the risk of dengue fever in an area of continuous dengue occurrence. METHODS This is a spatial population-based case-control(More)
Through regression analysis the relationship between noise-induced hearing loss and variables " total cumulative working time " , " arterial blood pressure " and " age " was examined. The study was carried out among 278 bus drivers and ticket takers, users of an occupational health center in Campinas, São Paulo State (Brazil). The main results were a(More)
Sugestão de uma associação inversa entre percepção de riscos ocupacionais e acidentes do trabalho Abstract Worker perception of risk influences worker behavior and consequently exposure to risks. However, an inverse relationship between perception of occupational risks and work-related injuries has not yet been clearly established. A matched case-control(More)
Schistosomiasis control programs in Brazil have helped reduce prevalence and the severe forms of the disease, but have failed to prevent new foci from appearing, especially on the periphery of large cities. The current article aims to assess the prevalence of schistosomiasis and the presence of intermediates hosts for Schistosoma mansoni in the district of(More)
Incidence of work-related accidents in Botucatu, São Paulo, Brazil, was estimated according to gender, age, employment status, occupation, and type of work. A household survey was conducted by systematic random group sampling (195 census tracts). Information was collected from all residents 10 years or older in each household. Of those who had worked during(More)
This study reviews articles on case-control studies in which the cases were classified in two or more types. Application of multinomial models and their adequacy for case-control studies are discussed. Among the available multinomial adjustments, we argue that the polytomous logistic model is the most suitable for obtaining epidemiological measures of risk(More)
This article reviews studies performed since 1975 on the occurrence of central and peripheral neurological manifestations in low-level lead exposure. The review shows that in many workers exposed to lead who present indications of both biological effects and exposure below the limits established by the Brazilian laws, abnormalities are found in peripheral(More)
Four new species of shallow-water marine gastropods belonging to the family Rissoidae are described from the Archipelago of the Azores: Setiaalexandrae sp. n., Setiaermelindoi sp. n., Setianetoae sp. n., and Manzoniamartinsi sp. n. These novelties increase the regional rissoid fauna to 39 species, of which 29 live in shallow-water habitats. A list of the(More)
This paper investigates the relationship between violent conflicts and risky sexual behavior in Uganda. We use geographical and temporal variation in conflict intensity and a difference-indifferences approach to evaluate how individual exposure to conflicts in the past 5 years influences the decision to engage in risky sex. We find that exposure to more(More)