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Week 1 of Medical Epidemiology

by: Aries07

Week 1 of Medical Epidemiology NURS-5020

Marketplace > Seattle University > NURSING > NURS-5020 > Week 1 of Medical Epidemiology
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About this Document

This is a brief description of basic epi concepts with a few visual aids.
Epidemiologic Analysis of Populations At Risk
Dr. Matsuzaki
Class Notes
medical, Epidemiology




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This 2 page Class Notes was uploaded by Aries07 on Wednesday October 5, 2016. The Class Notes belongs to NURS-5020 at Seattle University taught by Dr. Matsuzaki in Fall 2016. Since its upload, it has received 6 views. For similar materials see Epidemiologic Analysis of Populations At Risk in NURSING at Seattle University.


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Date Created: 10/05/16
Week 1 Epidemiology Epidemiology: is the study of distribution and determinants of disease in a population. Uses of epidemiology: surveillance, finding risk factors, used to asses the performance of screening tests, study of disease, and aid in guiding clinical practice. Person, place, time is part of descriptive epidemiology. Risk factors (determinants of disease) are part of analytic epidemiology. Demographic measures examples: Infant mortality (per 1000 live births) Maternal mortality (per 100,000 live births) Life expectancy at birth Cause-specific mortality A ratio involves the whole population under investigation. Sick workers/healthy workers A proportion is a special case of a ratio in which the numerator is a subset of the denominator Sick workers/All workers A rate is a ratio that expresses a change in the numerator with respect to the denominator Sick workers/Day Incidence Rate IR= A(population)/PT(person-time) This equation reflects the occurrence of new cases of the disease of interest. A=the new cases in the population PT=you add up the years each patient was observed. Person-time: 5 people at risk for one year = 5 person-years 1 person at risk for five years = 5 person-years Risk R=A(New cases)/N(Persons at risk) Prevalence Number of cases (new and existing)/total population Survival Curve (Age-)Adjusted rates - Allows for I distorted comparison of populations, even if they differ - Process applied to rates to allow communities with different (age structures) to be comparedWe


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