Question

Question 26 

In a clinical trial, a factorial design may be useful for all of the following reasons EXCEPT: 

To allow testing of a less mature hypothesis along with a more mature hypothesis 

To allow two exposures to best tested in a single study 

To study multiple outcomes 

To reduce cost 

To study combination effects of exposures 

Question 25 

Which of the following is an activity performed in analytic epidemiology 

Monitoring health-related states or events over time 

Understanding when the health problem is greatest 

Monitoring potential exposures over time 

Evaluating the effects of a treatment on a health outcome 

Understanding where the health problem is greatest 

Question 15

A screening test for a newly discovered disease was evaluated in order to determine how well the test performs. Investigators administered the test to a random sample of 900 people. Of the participants with the disease, 150 tested positive and 60 tested negative. Of those without the disease, 50 tested positive. What is the interpretation of the prevalence of the disease among the population sampled (expressed as a percentage)? 

For every 1,000 people, 2.33 developed the new disease 

Almost 17% of test subjects tested positive 

The risk for developing the new disease is almost 17% greater among people tested 

Over 23% of the population sampled had the new disease 

None of the answers listed

Answer 1

Answer 1: To reduce cost.

( Clinical trials are mainly concerned with the effect of treatment, medicine etc on a particular community.)

Answer 2: Evaluating the effects of treatment on a health outcomes.

(Analytical epidemiology includes the reasoning as how and when the disease occured)

Answer 3: Almost 17% subjects tested positive.