Multiple Choice
To test the efficacy of vitamin C in preventing colds, army recruits are randomly assigned to one of two groups: one in which 500 mg of vitamin C is administered daily, and one in which 500 mg of a placebo is administered daily. Both groups are followed to determine the number and severity of subsequent colds. Which of the following study designs most appropriately characterizes this situation?
A) Cross-sectional study
B) Case-control study
C) Prospective cohort study
D) Historical prospective cohort study
E) Clinical trial
Correct Answer:
Verified
Correct Answer:
Verified
Q16: Match the following terms with their definitions.<br>Protocol<br>A)
Q17: Treatment crossover refers to any change of
Q18: Controlled clinical trials enable researchers to:<br>A) test
Q19: Intervention designs involve only controlled clinical trials.
Q20: Which of the four stages of evaluation
Q22: The purpose of randomization is to reduce
Q23: A prophylactic trial is designed to:<br>A) compare
Q24: You would like to assess the effectiveness
Q25: To test the efficacy of a health
Q26: The entire population of a given community