A randomized, placebo-controlled trial was conducted in Indonesia to study the effects of Vitamin A in preventing deaths among children with measles. The investigators reported a r... A randomized, placebo-controlled trial was conducted in Indonesia to study the effects of Vitamin A in preventing deaths among children with measles. The investigators reported a relative risk of 0.60 for the intervention versus control group. This means that A. Children receiving Vitamin A were 40% less likely to die from measles than children receiving placebo B. The chance of dying from measles in the placebo group was 60% C. The chance of the null hypothesis being true is 60% D. 60% of the children who died received Vitamin A; the other 40% received placebo E. None of the above statements are true
Understand the Problem
The question provides a scenario related to a randomized trial studying the effects of Vitamin A on children with measles, specifically asking for an interpretation of the reported relative risk of 0.60. It requires understanding risk ratios and the implications of the findings from the study in terms of mortality rates.
Answer
A. Children receiving Vitamin A were 40% less likely to die from measles than children receiving placebo.
The final answer is A. Children receiving Vitamin A were 40% less likely to die from measles than children receiving placebo.
Answer for screen readers
The final answer is A. Children receiving Vitamin A were 40% less likely to die from measles than children receiving placebo.
More Information
The reported relative risk of 0.60 means there is a 40% reduction in the risk of death from measles for those receiving Vitamin A compared to the placebo group. Relative risk below 1.0 indicates reduced risk.
Tips
A common mistake is confusing relative risk with the absolute risk or the percentage of children affected in each group.
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