CDCA OSCE Questions with Correct Answers 2025

CDC-INTRODUCTION TO EPIDEMIOLOGY s s s




QUESTIONS WITH CORRECTANSWERS 2025 s s s s




Definition of Epidemiology - CORRECT ANSWER - s s s s s s




The study of the distribution and determinants of health-
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related states or events in specified populations, and the application of this study to the co
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ntrol of health problems.
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The study of epidemiology uses
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statistics, observation, biology
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Frequency - CORRECT ANSWER - s s s s




number of health events (number of cases) in relationship to the size of the population
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Pattern - CORRECT ANSWER -the occurrence of health related events based on- Time:
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s (annual, seasonal, weekly) s s




Place: (urban/rural, school/work)
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Person: (risk of illness, sex, age, economic status)
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Determinant - CORRECT ANSWER - s s s s




A factor or event that is capable of bringing about a change in the health status of a popul
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ation.
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What do epidemiologists study? - CORRECT ANSWER -Both communicable and non-
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communicable health problems
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What is an epidemiologist's top priority when given a patient? - CORRECT ANSWER -
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Determine the cause, and the number of people exposed to it (focuses on the population n
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ot the specific patient)
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, 400 BCE - CORRECT ANSWER -
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Hippocrates tries to explain that environmental factors and behaviors might influence diseas e
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1662 CE - CORRECT ANSWER - s s s s s




John Graunt publishes the first quantifiable data for mortality between different groups
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1800 CE - CORRECT ANSWER - s s s s s




William Farr (the father of viral statistics) builds on Gaunt's work by collecting, assembling,
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and evaluating viral statistic data
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1854 CE - CORRECT ANSWER - s s s s s




John Snow (father of field epidemiology) realizes through data and observation that the Bro
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ad Street pump was the source of a cholera epidemic
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Epidemiologists must assess community health by asking - CORRECT ANSWER - s s s s s s s s s s s




1. What are some potential and current health problems in the community?
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2. Where are they occurring? s s s




3. Are there specific populations with increased risk?
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4. Which problems have declined over time? s s s s s




5. Which ones are increasing or have the potential to increase? s s s s s s s s s




6. How do these patterns relate to distribution of health care?
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How do epidemiologists complete the clinical picture? - CORRECT ANSWER -
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They can identify the cause even if the diagnosis is unknown to help categorize the disease
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Public Health Surveillance - CORRECT ANSWER -
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the systematic collection, analysis, and interpretation of health data to gain knowledge of th
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e pattern of disease occurrence in order to control and prevent disease in the
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scommunity.