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HSC 404 Exam 2 (Ch 6-8) | Questions with 100% Correct Answers
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HSC 404 Exam 2 (Ch 6-8) | Questions with 100% Correct Answers Choose the incorrect answer regarding ecologic studies: A. An ecologic study is one that examines a group as a unit of analysis B. An ecologic comparison study is sometimes called a cross-sectional ecologic study C. The level of expos...

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  • November 18, 2024
  • 6
  • 2024/2025
  • Exam (elaborations)
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HSC 404 Exam 2 (Ch 6-8)



Choose the incorrect answer regarding ecologic studies:

A. An ecologic study is one that examines a group as a unit of analysis
B. An ecologic comparison study is sometimes called a cross-sectional ecologic study
C. The level of exposure for each individual in the unit being studied is well known
D. The ecologic fallacy occurs when incorrect inferences about the individual are made
from group level data

Ecologic Studies:

A. are expensive and require a great deal of time to conduct
B. are a good approach for generating hypothesis
C. provide accurate measurements of exposure
D. yield results that can be applied directly to individuals

Cross-sectional studies are:

A. Also termed prevalence studies
B. Exposure and disease measures obtained at the individual level
C. Single period of observation
D. Exposure and disease histories are collected simultaneously
E. All of the above

Which of the following conditions is not necessary in order to use the odds ratio to
estimate the relative?

A. With respect to exposure, controls are representative of the population to which you
want to generalize your results
B. The event (disease) under study is rare in the population
C. The exposure in question is rare in the population
D. Cases are representative of all cases

Cohort study is to risk ratio as:

A. Ecologic Fallacy is to cross-sectional study
B. Genetics is to environment
C. case-control is to odds ratio
D. A and C

, Practical considerations in the design of cohort studies do not usually include:

A. availability of exposure data
B. size and cost of the cohort
C. follow-up issues
D. scientific justification
E. age of the investigator

A major advantage of cohort studies over case-control studies with respect to the role of
a suspected factor in the etiology of a disease is that:

A. they take less time and are less costly
B. the can utilize a more representative population
C. it is easier to obtain controls that are not exposed to the suspected factor
D. they permit direct estimation of risk of disease in those exposed to the suspected
factor
E. they can be done on a double-blind basis

Subjects for an exposure-based cohort study would be selected most appropriately
from:

A. certain occupational groups such as battery workers
B. the residents of a large U. S. County
C. A and B
D. All of the above

Nested case-control studies:

A. use subjects drawn from a cohort study
B. provide a degree of control over confounding
C. reduce the cost of collecting exposure information
D. all of the above

An example of passive follow-up in cohort studies is:

A. collection and maintenance of data by the federal government
B. telephone calls to study participants
C. Use of follow-up mailings
D. use of written invitations to return to the study site

A prophylactic trial is designed to:

A. Compare rates of disease, death, and recovery in a population
B. Measure how well drugs produce improvement
C. Evaluate the effectiveness of a substance used to prevent disease
D. Estimate the impact of exposure on the incidence of disease

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