A clinical Trial is conducted comparing a new pain medication for arthritis. Par
ID: 3042944 • Letter: A
Question
A clinical Trial is conducted comparing a new pain medication for arthritis. Participants are randomly assigned to recieve the new medication or a placebo. The outcome is pain relief within 30 minutes. The data are shown below:
Estimate the risk difference in pain relief between treatments?
RD=
Estimate the relative risk in pain relief between treatments?
RR=
Estimate the odds ratio in pain relief between treatments?
OR=
The upper and lower limits of the OR are shown below:
Lower limit of CI: 0.41
Upper Limit of CI: 1.61
Based on the confidence interval values which of the following are true?
A. One can be 95% confident that the true value will be greater than the upper limit
B. One can be 95% confident that the true value will be greater than the lower limit
C. One can be 95% confident that the true value will be between the upper and lower limit
D. A and B
Pain Relief No Pain Relief New Medication 44 76 Placebo 21 99Explanation / Answer
Risk difference = 44/120-21/120=23/120=0.192
Relative risk = 44/120 / (21/120)=44/21=2.095
Odds ratio = 44/76/(21/99) = 2.729
C. One can be 95% confident that the true value will be between the upper and lower limit
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