Calculate the Numbers Needed to Treat (NNT) for the effect of exercise on sleep using the following fictitious data: In a study of exercise in the elderly, 20% of persons in the exercise group reported better sleep, whereas 4% did so in the comparison group.
A) NNT = 16
B) NNT = 8
C) NNT = 5
D) NNT = 7
Correct Answer:
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