George Washington University MPH 6003 Quiz 4 1)In 1948 researchers began gathering data on a group 5,209 men and women in Framingham Massachusetts

George Washington University

MPH 6003

Quiz 4

1)In 1948 researchers began gathering data on a group 5,209 men and women in Framingham Massachusetts. All participants were between the ages of 30 and 62 years old and had no history of heart attacks or strokes. They were examined at regular intervals and any cases of heart attacks or strokes were recorded.

Select one:

2. Which of the following statements describes a major advantage of randomly assigning study participants to the different treatment groups in a clinical trial (i.e. randomization)? Select one:

3. All of the following statements are generally true of prospective cohorts studies EXCEPT:

4. In all experimental studies the researcher only has complete control of

5. Imagine you have the following results from a study, stratified on 2 levels of some characteristic:

Stratum 1 OR = 0.333

Stratum 2 OR = 0.335 Crude OR = 0.334

These results are most consistent with the characteristic being Select one:

6. Among elderly subjects who are fit, vigorous exercise reduces the risk of heart disease which could lead to a reduction in such things as myocardial infarctions. However, among elderly subjects who are unfit, the initiation of vigorous exercise might precipitate a myocardial infarction (i.e. heart attack). Fitness may be considered a potential:

7. Cases and controls were enrolled into a study of end-stage renal disease. Participants were interviewed about their lifetime consumption of Ibuprofen and other medications. All participants tended to have difficulty correctly estimating their lifetime medication use, and cases and controls provide about the same quality of data. This situation would lead to:

Select one:

8. The scenario described in question 7 would most likely lead to Select one:

9. Which of the following statements about the p-value is true? Select one: