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A RCT Parallel study was conducted to evaluate the effectiveness of a new drug (Drug X)...

A RCT Parallel study was conducted to evaluate the effectiveness of a new drug (Drug X) in treating a specific disease, and a control group using Placebo was also included in this study. The effectiveness of a drug or placebo was defined as the percentage of Success in the corresponding group. Table 2 summarized the data from the study. Calculate the 95% CI of the difference in the Success percentage between Group Drug X and Group Placebo.  

Table 2. Drug efficacy data

Group Placebo

Group Drug X

# of Success

25

84

# of Failure

75

60

Total patients

100

144
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