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Epidemiology
Midterm Exam
16
Other
Graduate
02/17/2009

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Cards

Term
What are the 2 types of epidemiological studies?
Definition
Observational & Experimental
Term
What type of study is where the Epidemiologist observes exposure and outcome without controlling either?
Definition
Observational
Term
Types of Epidemiological Studies:
Definition

Observational: Epidemiologist observes exposure and outcome without controlling either

Descriptive: Epidemiologist collects information to characterize and summarize health event (who, what where & when)

Analytical: Epidemiologist compares groups to identify risk factors (why & how)

Experimental (Clinical): Epidemiologist controls exposure of subjects to an intervention and observes the outcome

Term
What type of study is where an Epidemiologist controls exposure of subjects to an intervention and observes the outcome?
Definition

Experimental

Term
What are the 2 types of observational epidemiological studies?
Definition
Descriptive & Analytical
Term
What is the difference b/w descriptive & analytical epidemiological studies?
Definition
Descriptive: Epidemiologist collects information to characterize and summarize health event (who, what where & when)...
Analytical: Epidemiologist compares groups to identify risk factors (why & how)
Term
Cross-Sectional Study:
Definition
A type of prevalence study;
Exposure and disease measures obtained at the individual level;
Single period of observation;
Exposure and disease histories collected simultaneously;
Both probability and non-probability sampling methods used...In examples of this type of study, used the word "survey" a lot.
Term
What are the uses of Cross-Sectional Studies?
Definition
Hypothesis generation;
Intervention planning;
Estimation of the magnitude and distribution of a health problem
Term
Which type of study uses comparison groups to quantify relationships between exposure and outcomes?
Definition
Analytical Epidemiology
Term
What are the 2 types of analytical studies?
Definition
Cohort & Case control studies
Term
______ compare groups of people who have been exposed to suspected risk factors with groups who have not been exposed?
Definition
Cohort Studies
Term
__________ compare people with a disease (case-patients) with a group of people without the disease (controls)?
Definition
Case-Control Studies
Term
What are the 2 sampling strategies for Cohort studies?
Definition
Population Based & Exposure Based
Term
Testing Statistical Significance determines how likely...?
Definition
the study results could have occurred by chance
Term
What is the "null hypothesis" when testing statistical significance?
Definition
That there is no association between exposure and outcome. If the p-value is less than <0.05, than you reject this hypothesis!
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