Match each clinical research scenario or statistical objective to the most appropriate measure of association or impact used to quantify it.
- Investigators recruit hospitalized patients with severe acute pancreatitis and compare their history of thiazide diuretic use to that of patients admitted for non-pancreatic conditions.Odds Ratio (OR)
- A cardiovascular trial utilizes a Kaplan-Meier estimator to report the relative likelihood of a myocardial infarction occurring at any precise moment among patients on a novel antiplatelet drug versus standard therapy.Hazard Ratio (HR)
- Researchers studying a cohort of industrial miners calculate the specific fraction of chronic beryllium disease cases that would theoretically not have occurred if the miners had never been exposed to beryllium dust.Attributable Risk Percent (ARP)
- A clinical trial demonstrates that an experimental weight-loss medication increases the absolute risk of cholelithiasis by . Clinicians calculate how many patients must be prescribed the drug to expect one extra case of gallstones.Number Needed to Harm (NNH)
Answer
The scenarios correctly match to: Case-control study with Odds Ratio (OR), Survival analysis with Hazard Ratio (HR), Proportion of disease due to exposure with Attributable Risk Percent (ARP), and Patient count for one adverse event with Number Needed to Harm (NNH).
Each statistical measure serves a highly specific epidemiological function. Case-control studies necessitate the use of an Odds Ratio because incidence cannot be directly measured. Survival analyses utilize Hazard Ratios to compare instantaneous event rates over a continuum of time. Attributable Risk Percent isolates the proportion of disease incidence directly resulting from a specific exposure. Finally, the Number Needed to Harm translates absolute risk increases into a clinically actionable patient count.
Step-by-Step Solution
Key Concept
Selection of epidemiological metrics based on specific study designs and clinical objectives.