HS3311 Self-Quiz Unit 4 Attempt review PDF

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Started on Thursday, 2 December 2021, 2:56 PM State Finished Completed on Thursday, 2 December 2021, 3:09 PM Time taken 13 mins 34 secs Marks 3/10. Grade 30  out of 100.Question  1Incorrect Mark 0 out of 1.Question  2Correct Mark 1 out of 1.In Prospective studies, the investigator doe...

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Started on Thursday, 2 December 2021, 2:56 PM State Completed on Time taken Marks Grade

Finished Thursday, 2 December 2021, 3:09 PM 13 mins 34 secs 3.00/10.00 30.00out of 100.00

Question1 Incorrect Mark 0.00 out of 1.00

In Prospective studies, the investigator does the following except:

Select one: a.

Starts the study (from the beginning) with the identification of the population and the exposure status

b. Follows them (over time) for the development of disease c.

Determine disease status at the present time (no future follow-up)

d. Takes a relatively long time to complete the study (as long as the length of the study)

The correct answer is: Determine disease status at the present time (no future follow-up)

Question2 Correct Mark 1.00 out of 1.00

A retrospective cohort studies are characterized by all of the following except:

Select one: a.

The study groups are exposed and non-exposed

b. Incidence rates may be computed c.

The required sample size is smaller than that needed for a prospective cohort study

d. The required sample size is similar to that needed for a prospective cohort study.

The correct answer is: The required sample size is smaller than that needed for a prospective cohort study

Question3 Incorrect Mark 0.00 out of 1.00

The Iowa Women’s Health Study, in which researchers enrolled 41,837 women in 1986 and collected exposure and lifestyle information to assess the relationship between these factors and subsequent occurrence of cancer, is an example of which type(s) of study?

Select one: a.

Experimental

b. Observational c.

Cohort

d. Case-control e.

Clinical trial

The correct answer is: Cohort

Question4 Incorrect Mark 0.00 out of 1.00

A study in which children are randomly assigned to receive either a newly formulated vaccine or the currently available vaccine, and are followed to monitor for side effects and effectiveness of each vaccine, is an example of which type of study?

Select one: a.

Experimental

b. Observational c.

Cohort

d. Case-control e.

Clinical trial

The correct answer is: Clinical trial

Question5 Correct Mark 1.00 out of 1.00

The following bias could occur in the cohort studies:

Select one: a.

Selection bias

b. Information bias c.

Misclassification bias

d. All the above e.

None of the above

The correct answer is: All the above

Question6 Incorrect Mark 0.00 out of 1.00

British investigators conducted a study to compare measles-mumps-rubella (MMR) vaccine history among 1,294 children with pervasive development disorder (e.g., autism and Asperger’s syndrome) and 4,469 children without such disorders. (They found no association.) This is an example of which type(s) of study?

Select one: a.

Experimental

b. Observational c.

Cohort

d. Case-control e.

Clinical trial

The correct answer is: Case-control

Question7 Incorrect Mark 0.00 out of 1.00

The following is not true about case control studies:

Select one: a.

usually conducted before a cohort or an experimental study

b. is preferred when the exposure is common c.

can be conducted in a shorter time

d. is preferred when the disease is rare

The correct answer is: is preferred when the exposure is common

Question8 Incorrect Mark 0.00 out of 1.00

A key feature of a cross-sectional study is that:

Select one: a. It usually provides information on prevalence rather than incidence b. It is limited to health exposures and behaviors rather than health outcomes c.

It is more useful for descriptive epidemiology than it is for analytic epidemiology

d. It is synonymous with the survey

The correct answer is: It usually provides information on prevalence rather than incidence

Question9 Correct Mark 1.00 out of 1.00

__________ is the process of selecting controls in a case-control study so that the controls are similar to the cases with regard to certain key characteristics—such as age, sex, and race.

Select one: a.

Recall bias control

b. Matching c.

Nested controls

d. Randomization e.

use of multiple control groups

The correct answer is: Matching

Question10 Incorrect Mark 0.00 out of 1.00

The following are advantages of cross sectional studies except:

Select one: a.

Relatively cheaper

b. Temporal relationships between exposure and disease can be determined c.

One can determine prevalence of the disease or outcome.

d. It provides clues for further research into the etiology of diseases

The correct answer is: Temporal relationships between exposure and disease can be determined...