Question27 This health research indicator is typically used in case controlled studies where the outcome has already occurred thus making it a retrospective analysis. A value greater than 1 indicates an increase of the outcome with exposure, while a value of less than 1 indicates decrease.Which of the below best fits this decriptor ? Select one alternative: Hazard ratio Alternative ratio Health ratio Odds ratio ResetSingle choice
A
Hazard ratio
B
Alternative ratio
C
Health ratio
D
Odds ratio

Question

Question27 This health research indicator is typically used in case controlled studies where the outcome has already occurred thus making it a retrospective analysis. A value greater than 1 indicates an increase of the outcome with exposure, while a value of less than 1 indicates decrease.Which of the below best fits this decriptor ? Select one alternative: Hazard ratio Alternative ratio Health ratio Odds ratio ResetSingle choice

A

Hazard ratio

B

Alternative ratio

C

Health ratio

D

Odds ratio

BlackTom AI · Accepted Answer

Question stems describe a health research indicator commonly used in case-control studies where the outcome has already occurred, making the analysis retrospective. The interpretation given—values >1 imply increased outcome with exposure, and values <1 imply decreased outcome with exposure—aligns with how odds ratios are interpreted in such study designs. Option 1: Hazard ratio This option refers to a hazard ratio, which is used in time-to-event or survival analyses. It compares hazard rates between groups over time. While values >1 or <1 convey higher or lower risk, the hazard ratio is not the primary measure described for retrospective case-control settings, and its interpretation emphasizes time to event rather than simply odds of exposure given outcome. This makes it a less fitting descriptor for the scenario provided. Option 2: Alternative ratio The term "alternative ratio" is not a standard or widely recognized epidemiological measure. Because it lacks a defined, established meaning in this context, it cannot accurately describe the association between exposure and outcome in retrospective case-control designs. Its ambiguity makes it an unsuitable choice here. Option 3: Health ratio Similar to the previous option, "health ratio" is not a conventional epidemiological statistic used in case-control studies. Without a clear, accepted definition, this option does not match the description of a retrospective measure where the outcome has occurred and the direction of association is conveyed by ratios greater or less than 1. Its lack of standard interpretation renders it incorrect for this question. Option 4: Odds ratio The odds ratio is the classic measure used in case-control studies, which are inherently retrospective because the outcome has already occurred when the data are collected. Its interpretation—an OR > 1 indicates higher odds of exposure among cases (those with the outcome), and an OR < 1 indicates lower odds—fits the descriptor given in the question. This aligns with standard epidemiological practice for retrospective analyses and case-control design.

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