Disease Prevention

Disease Prevention

Disease prevention is a procedure through which individuals, those with risk factors for a disease or without the risk factors, are treated in order to prevent a disease from occurring. Treatment normally begins either before signs and symptoms of the disease occur, or shortly thereafter. Prevention includes a wide range of activities — known as “interventions” — aimed at reducing …

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Cross-Sectional Study

Cross-Sectional Study

A cross-sectional study (also known as a cross-sectional analysis, transverse study, prevalence study) is a type of observational study that analyzes data from a population, or a representative subset, at a specific point in time. It examines the relationship between diseases (or other health-related states) and other variables of interest as they exist in a defined population at a single point in time or over a short …

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Theories of Disease

Theories of Disease

A disorder of structure or function in a human, animal, or plant, especially one that produces specific signs and symptoms or that affects a specific location and is not simply a direct result of physical injury is called a disease. It is a particular abnormal, pathological condition that affects part or all of an organism. It is often construed as a …

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Branches of Epidemiology

Branches of Epidemiology

Epidemiology is the study of how the disease is distributed in populations and the factors that influence or determine this distribution. It is defined as “the study of the distribution and determinants of health-related states or events in specified populations and the application of this study to control of health problems.” Information from epidemiologic studies frequently is used to plan …

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Epidemiology- History, Objectives and Types

Epidemiology- History, Objectives and Types

Epidemiology, as defined by Last, is “the study of the distribution and determinants of health-related states or events in specified populations, and the application of this study to the prevention and control of health problems”. Epidemiologists are concerned not only with death, illness, and disability, but also with more positive health status and, most importantly, with the means to improve …

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Case-Control Study

Case-Control Study

A case-control study (also known as a case-referent study) is a type of observational study in which two existing groups differing in outcome are identified and compared on the basis of some supposed causal attribute. It is designed to help determine if an exposure is associated with an outcome (i.e., disease or condition of interest). In recent years, the case-control …

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