Match each clinical or epidemiological scenario to the most appropriate statistical measure of association or impact that should be calculated.
- A physician wants to communicate the practical clinical benefit of a new migraine prophylaxis medication by expressing exactly how many patients must receive the drug to prevent one attack.Number needed to treat (NNT)
- Researchers conducting a case-control study need to report the statistical association between maternal use of a specific anticonvulsant and the occurrence of a rare neural tube defect.Odds ratio (OR)
- An epidemiologist wishes to determine the absolute excess incidence of stroke that is directly attributable to uncontrolled hypertension within a specific cohort of adult patients.Attributable risk (AR)
- A public health department aims to estimate the proportion of all lung cancer cases in their jurisdiction that could theoretically be eliminated if tobacco smoking were completely eradicated.Population attributable risk percent (PAR%)
Answer
The correct matches are: 1) Clinical benefit communication matches with Number needed to treat (NNT); 2) Case-control study matches with Odds ratio (OR); 3) Absolute excess incidence matches with Attributable risk (AR); 4) Proportion of all cases in a population matches with Population attributable risk percent (PAR%).
Each scenario specifically describes the defining characteristic of a different biostatistical measure. NNT is uniquely suited for translating absolute risk reduction into a tangible number for clinical practice. OR is the mathematically required measure of association for case-control studies. AR isolates the excess risk within an exposed group, while PAR% scales that risk to demonstrate public health impact across an entire population.
Step-by-Step Solution
Key Concept
Selection of appropriate measures of association and impact based on study design and clinical or public health objectives.