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Epidemiological (and other observational) studies typically highlight associations between exposures and outcomes, rather than causation. While some consider this a limitation of observational research, epidemiological models of causation (e.g. Bradford Hill criteria) [7] contend that an entire body of evidence is needed before determining if an association is truly causal. [8]
Epidemiology is the study and analysis of the distribution (who, when, and where), patterns and determinants of health and disease conditions in a defined population, and application of this knowledge to prevent diseases.
Field epidemiology as part of hurricane response measures. Field Epidemiology is the application of epidemiologic methods to unexpected health problems when a rapid on-site investigation is necessary for timely intervention. [1] A more expansive definition is: The practice of Epidemiology in the field. Work is done in communities often as a ...
Public health surveillance (also epidemiological surveillance, clinical surveillance or syndromic surveillance) is, according to the World Health Organization (WHO), "the continuous, systematic collection, analysis and interpretation of health-related data needed for the planning, implementation, and evaluation of public health practice."
The Bradford Hill criteria, otherwise known as Hill's criteria for causation, are a group of nine principles that can be useful in establishing epidemiologic evidence of a causal relationship between a presumed cause and an observed effect and have been widely used in public health research.
Sentinel systems involve a network of reporting sites, typically doctors, laboratories and public health departments. Surveillance sites must offer: [3] commitment to resource the program; a high probability of observing the target disease, a laboratory capable of systematically testing subjects for the disease, experienced, qualified staff.
Practitioners can come from several different educational streams: many begin as registered nurses, some as public health inspectors (environmental health officers), some as medical technologists (particularly in clinical microbiology), and some as physicians (typically infectious disease specialists). Specialized training in infection control ...
Major research challenges in social epidemiology include tools to strengthen causal inference, [5] [6] methods to test theoretical frameworks such as Fundamental Cause Theory, [7] translation of evidence to systems and policy changes that will improve population health, [8] and mostly obscure causal mechanisms between exposures and outcomes. [9]