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BS Nursing Epidemiology
nmdcat.online June 6, 2026

28. In a medicinal trial, a drug’s effectiveness is assessed by comparing the rate of disease in the treated group to the rate in the placebo group. What technical measure of effect is typically reported for vaccine studies, but applicable here?

A. Number Needed to Treat (NNT).
B. Relative Risk Reduction (RRR).
C. Absolute Risk Reduction (ARR).
D. Efficacy (or Vaccine Efficacy).
✓

📖 Additional Information

  • Number Needed to Treat (NNT).
  • Relative Risk Reduction (RRR).
  • Absolute Risk Reduction (ARR).
  • Efficacy (or Vaccine Efficacy).

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