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3 - Epidemiology

from Part 1 - The Public Health Toolkit

Published online by Cambridge University Press:  01 December 2023

Kirsteen Watson
Affiliation:
University of Cambridge
Jan Yates
Affiliation:
NHS England and NHS Improvement
Stephen Gillam
Affiliation:
University of Cambridge
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Summary

At the core of epidemiology is the use of quantitative methods to study health, and how it may be improved, in populations. It is important to note that epidemiology concerns not only the study of diseases but also of all health-related events. Rational health-promoting public policies require a sound understanding of causation. The epidemiological analysis of a disease or activity from a population perspective is vital in order to be able to organize and monitor effective preventive, curative and rehabilitative services. All health professionals and health-service managers need an awareness of the principles of epidemiology. They need to go beyond questions relating to individuals to challenging fundamentals such as ‘Why did this person get this disease at this time?’, ‘Is the occurrence of the disease increasing and, if so, why?’ and ‘What are the causes or risk factors for this disease?’

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