Study designs: practice question

A PSM question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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PSM · Study designs

Sample item

Which measure is directly calculated in a cohort study?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

C. Relative risk

Cohort studies measure disease incidence in exposed and unexposed groups, allowing direct calculation of risk and relative risk.

Option by option

  • A. Odds ratio only

    Odds ratio is classically used in case-control studies.

  • B. Median survival only

    Median survival can be measured but is not the defining association measure.

  • C. Relative risk (correct)

    Correct: cohort incidence data allow direct relative-risk calculation.

  • D. Kappa statistic

    Kappa measures agreement, not exposure risk.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

More PSM questions

Questions about this PSM question

What is the answer to this PSM question?

The best answer is C, Relative risk. Cohort studies measure disease incidence in exposed and unexposed groups, allowing direct calculation of risk and relative risk.

Why is "Odds ratio only" not the answer?

Odds ratio is classically used in case-control studies.

Why is "Median survival only" not the answer?

Median survival can be measured but is not the defining association measure.

Why is "Kappa statistic" not the answer?

Kappa measures agreement, not exposure risk.

What concept does this question test?

It tests Study designs in PSM. The correct option holds because: Correct: cohort incidence data allow direct relative-risk calculation.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Study designs?

Practise biostatistics with small calculations until sensitivity, predictive values and risk measures are automatic. Then use the flashcards and the other PSM questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.