Case Control and Cohort Studies Flashcards Preview

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Flashcards in Case Control and Cohort Studies Deck (13)
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1

In ____ ____ studies the subjects are selected on the basis of whether they do or do not have a particular disease

case control

2

They key disadvantage to a case control study is that you cannot determine ____ and _____

cause and effect

3

If all cases of disease diagnosed at time the study initiated; it is ____________ case control

retrospective

4

If the study is begun, and all new cases that are diagnosed within a certain period are entered into the study; it is a _______ case control

prospective

5

True or False
It is important to carefully select the study groups and ensure there are sources of information about expose and disease when dealing with case control studies

True

6

True or False
The control of a case control study should be one that would have been included as a case had they developed the disease

True

7

In a ______ studies; groups or groups of individuals are defined on the basis of exposure to a suspected risk factor for disease

cohort

8

True or False
It is acceptable in a cohort study for the subject to have early onset of the disease

False; the subject MUST be disease free at the start of the study

9

The two frequencies combined into a single summary statistic that estimates the association between exposure and risk of developing a disease is the ____ _____ (or _____ ____)

relative risk (or risk ratio)

10

Relative risk indicates the _______ of developing the disease in the exposed group relative to those not exposed

likelihood

11

With a _______ cohort study, the exposure and outcome/disease have already occurred at the start of the study; efficient for those diseases with a long latency period

retrospective

12

With a ________ cohort study, the sequence between exposure and disease is established; it helps to reduce bias, and to examine multiple effete of a single exposure

prospective

13

Some major issues in the interpretation of cohort studies include bias and the effect of losses to _____ _____ (which can take many years)

follow up