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Epidemiology describes who, when, and where health conditions occur and investigates the determinants that influence them.
Epidemiology is the study of the distribution, patterns, and determinants of health and disease within defined populations, along with the application of this knowledge to prevent illness and improve public health. It examines who is affected, when and where conditions occur, and how biological, environmental, social, behavioral, and genetic factors influence health outcomes. Epidemiologists support evidence-based policy and practice through study design, data collection, statistical analysis, interpretation, and communication of findings. The field uses descriptive, analytical, and experimental approaches, including surveillance, outbreak investigation, case-control studies, cohort studies, clinical trials, and community trials. Modern epidemiology incorporates advanced statistics, mathematical modeling, machine learning, molecular biomarkers, genetic information, and digital data sources. Its applications range from infectious diseases and syndemics to chronic conditions such as cancer, diabetes, cardiovascular disease, mental illness, obesity, and hypertension.
Epidemiology describes who, when, and where health conditions occur and investigates the determinants that influence them.
Its central public health purpose is to identify risk factors, understand causes and transmission, guide prevention, and inform health policy.
Epidemiologists use observational and experimental study designs, including case-control studies, cohort studies, randomized controlled trials, and community trials.
Important determinants include environmental exposures, biological agents, genetics, lifestyle, social conditions, and access to healthcare.
Modern epidemiology combines public health with biology, statistics, social sciences, engineering, informatics, molecular pathology, and genetic research.
The study of the distribution, patterns, and determinants of health and disease in populations and the application of this knowledge to prevent disease.
The occurrence of health events according to person, place, and time.
Factors such as biological, environmental, social, behavioral, and genetic influences that affect health outcomes.
The ongoing and systematic collection, analysis, interpretation, and dissemination of health data.
An exposure or characteristic associated with an increased or decreased likelihood of developing a disease or health condition.
A retrospective study that compares exposures among people with a disease and comparable people without it.
A study that follows groups defined by exposure status over time to compare their health outcomes.
A framework for analyzing disease through the interaction of the host, agent, and environment.
Distortion of an observed association caused by the influence of an additional factor related to both the exposure and the outcome.
The study of relationships between molecular markers, exposures, genetic factors, and disease development or progression.
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