Question

3-3. Randomization. A randomized clinical trial was designed to compare two different treatment approaches for irritable-bowel syndrome. The purpose of randomization in this study was to: a. increase patient compliance with treatment. b. obtain comparison groups that are similar on other variables that may influence the disease. c. obtain comparison groups that are similar on any other variables measured in the study. d. Increase the likelihood of finding a significant effect of treatment. e. obtain a representative sample in the study. 3-9. Randomization: Clinical Trials. What is the purpose of randomization in a clinical trial? (Choose one best answer.] a. To make the diseased and non-diseased as similar as possible with respect to all variables except the exposure of interest b. To reduce the number of subjects who are lost to follow-up c. To isolate the effect of the exposure of interest d. To encourage compliance with the assigned treatment regimen

Answer 1

3.3 answer- c

Obtaine comparison groups that are similar on any other variables measured in the study

3.9 answer a