The data in accompanying table describe results from a clinical trial of a drug.

Question

The data in accompanying table describe results from a clinical trial of a drug. Some subjects were treated with the drug while others were given a placebo: then headache events were recorded. Find the odds ratio for headaches in treatment group compared to the placebo group, then interpret the result. Should users of the drug be concerned about headaches as an advance reaction? The odds ratio is _______. Interpret the result. The odds in favor of a headache are __________ times higher for someone using the drug as opposed to using a placebo. Users of the drug (1) _______ be concerned about headaches as an adverse reaction, because the odd ratio shows that users of the drug were (2) __________ likely to have a headache than people who used a placebo. should should not less more

Explanation / Answer

Odds[1] = present[1]/absent[1] = 4.969 near about 5
Odds[2] = present[2]/absent[2] = 28.692 near about 28
Odds Ratio = Odds[1]/Odds[2] = 0.173

Here the odds ratio = 0.173

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