NR 503 Week 4 Midterm Exam
NR 503: Population Health, Epidemiology &
Statistical Principles
, Question 1
Which of the following statements best describe efficacy?
It is an estimate of the benefit of treatment under ideal conditions
It is an estimate of the reduction of disease in treated groups
Question 2
A study is conducted for a pharmaceutical agent that has shown promise for reducing heart disease
among women. In order to more fully test the agent, an additional study is done restricting the
participants to be r&omized to those who have a history of hypertension. Which of the following
advantages cannot be claimed by the researchers?
The generalizability of the study is increased
Question 3
What is the main advantage of the r&omization of the 168 study participants to one of the two drug
treatment groups?
Reduces the potential for selection bias in allocation of treatment group
Question 4
After entry into the study, patients were first classified into three groups, those who had a previous
AMI, those with a first AMI who were at high risk for other cardiovascular diseases such as congestive
heart failure, & those with a first AMI who were at low risk for other cardiovascular diseases. Which
term best describes the study design?
R&omized clinical trial with stratified r&omization
Question 5
After assignment to treatment group, 77% of those in the placebo group were men, while 80% of
those in the drug X group were men. Which statement is most likely to be true?
R&omization was successful since the investigators did not alter the selection of participants in either
group in order to ensure equal percentages of men
Question 6
A preliminary analysis was conducted after 6 months & found that 87% of participants in the placebo
group & 85% of those in the drug X group had taken more than 90% of their prescribed dosages.
Which statement best describes this finding?
NR 503: Population Health, Epidemiology &
Statistical Principles
, Question 1
Which of the following statements best describe efficacy?
It is an estimate of the benefit of treatment under ideal conditions
It is an estimate of the reduction of disease in treated groups
Question 2
A study is conducted for a pharmaceutical agent that has shown promise for reducing heart disease
among women. In order to more fully test the agent, an additional study is done restricting the
participants to be r&omized to those who have a history of hypertension. Which of the following
advantages cannot be claimed by the researchers?
The generalizability of the study is increased
Question 3
What is the main advantage of the r&omization of the 168 study participants to one of the two drug
treatment groups?
Reduces the potential for selection bias in allocation of treatment group
Question 4
After entry into the study, patients were first classified into three groups, those who had a previous
AMI, those with a first AMI who were at high risk for other cardiovascular diseases such as congestive
heart failure, & those with a first AMI who were at low risk for other cardiovascular diseases. Which
term best describes the study design?
R&omized clinical trial with stratified r&omization
Question 5
After assignment to treatment group, 77% of those in the placebo group were men, while 80% of
those in the drug X group were men. Which statement is most likely to be true?
R&omization was successful since the investigators did not alter the selection of participants in either
group in order to ensure equal percentages of men
Question 6
A preliminary analysis was conducted after 6 months & found that 87% of participants in the placebo
group & 85% of those in the drug X group had taken more than 90% of their prescribed dosages.
Which statement best describes this finding?
