نتایج جستجو برای: epidemiologic methods
تعداد نتایج: 1889172 فیلتر نتایج به سال:
Population exposure to multiple chemicals in air presents significant challenges for environmental public health. Air quality regulations distinguish criteria air pollutants (CAPs) (e.g., ozone, PM2.5) from hazardous air pollutants (HAPs)-187 chemicals which include carcinogens and others that are associated with respiratory, cardiovascular, neurological and numerous other non-cancer health eff...
The principal wildlife reservoir of Mycobacterium bovis in Ireland is the European badger. Studies in the Republic of Ireland (RoI) have shown that badgers culled in association with cattle herd tuberculosis breakdowns (focal culling) have a higher prevalence of infection than the badger population at large. This observation is one rationale for the medium term national strategy of focal badger...
Recruitment of young people for epidemiologic research remains challenging, with marked decreases in the effectiveness of face-to-face, mail, and telephone recruitment methods. We report on the implementation and feasibility of an innovative and flexible approach used to recruit participants for a longitudinal cohort study about contraceptive use and pregnancy (the Contraceptive Use, Pregnancy ...
Experiences in the past decade provide guidance in selecting priorities for investigation of health hazards in chemical industries. Pride of place should be given to the experience of large industrial populations, in part simply because large numbers of people are at risk and in part because such studies are more likely to give reliable answers. This recommendation has further strength when the...
Epidemiology is the study of disease in populations. Veterinarians and others involved in the preventive medicine and public health professions use epidemiological methods for disease surveillance, outbreak investigation, and observational studies to identify risk factors of zoonotic disease in both human and animal populations. Knowledge of these risk factors is used to direct further research...
Classical unlined sanitary landfills are well-known to release large amounts of hazardous and otherwise deleterious chemicals to nearby groundwater and to the air, via leachate ("garbage juice") and landfill gas. It is known that such releases contain a wide variety of potential carcinogens and potentially toxic chemicals that represent a threat to public health. However, little quantitative in...
INTRODUCTION Many epidemiological methods for analysing follow-up studies require the calculation of rates based on accumulating person-time and events, stratified by various factors. Managing this stratification and accumulation is often the most difficult aspect of this type of analysis. TUTORIAL We provide a tutorial on accumulating person-time and events, stratified by various factors i.e...
BACKGROUND Two main methods of quantifying cancer patient survival are generally used: cancer-specific survival and relative survival. Both techniques are used to estimate survival in a single population, or to estimate differences in survival between populations. Arguments have been made that the relative survival approach is the only valid choice for population-based cancer survival studies b...
BACKGROUND The objectives of this study are to explore the effects of the new 1996 guidance requiring explicit demonstration of competencies on the nature of successful MFPHM Part II reports, how successful candidates claimed competency areas in their two reports and the effects of the subject areas of the report on the specific competencies claimed. METHODS The abstracts of candidates who pa...
INTRODUCTION According to the World Health Organization estimates annually in the world die due to CVI every sixth women and 10(th) man. This paper is the research of the correlation between changes in relative air humidity and stroke (CVA) in the Sarajevo Canton. Included are patients who experienced an acute stroke in the Canton of Sarajevo and treated in the pre hospital phase by the staff o...
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