Question:easy
The ratio between the incidence of disease among exposed and non-exposed is called
The ratio between the incidence of disease among exposed and non-exposed is called
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Think cohort study, forward-looking, incidence ratio, not a difference and not odds.
Updated On: Jul 7, 2026
- Causal risk
- Relative risk
- Attributable risk
- Odds ratio
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept.
We need the name of the measure that turns two incidence rates, one in an exposed group and one in a non-exposed group, into a single ratio.
Step 2: Key Approach.
When a cohort study follows both groups forward and counts new cases in each, the ratio $\dfrac{\text{incidence in exposed}}{\text{incidence in non-exposed}}$ is called relative risk. It tells us how many times more likely the exposed group is to develop the disease.
Step 3: Detailed Explanation.
If we instead subtracted the two incidence rates rather than dividing them, that would give attributable risk, a difference, not a ratio. Odds ratio belongs to case control studies, where we start from disease status and compare the odds of past exposure between cases and controls, so it is not the exposed to non-exposed incidence ratio either. Causal risk is not a term used in standard epidemiology.
Step 4: Final Answer.
The measure being described, an incidence ratio between exposed and non-exposed groups, is relative risk.
We need the name of the measure that turns two incidence rates, one in an exposed group and one in a non-exposed group, into a single ratio.
Step 2: Key Approach.
When a cohort study follows both groups forward and counts new cases in each, the ratio $\dfrac{\text{incidence in exposed}}{\text{incidence in non-exposed}}$ is called relative risk. It tells us how many times more likely the exposed group is to develop the disease.
Step 3: Detailed Explanation.
If we instead subtracted the two incidence rates rather than dividing them, that would give attributable risk, a difference, not a ratio. Odds ratio belongs to case control studies, where we start from disease status and compare the odds of past exposure between cases and controls, so it is not the exposed to non-exposed incidence ratio either. Causal risk is not a term used in standard epidemiology.
Step 4: Final Answer.
The measure being described, an incidence ratio between exposed and non-exposed groups, is relative risk.
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