Biostats Module 4
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Questions and Answers

What does sensitivity measure in screening or diagnosis?

  • Ability to correctly identify people with the condition (correct)
  • Ability to correctly exclude people with the condition
  • Ability to correctly identify people without the condition
  • Ability to correctly exclude people without the condition

    • In relative risk, what does a value of 1 indicate?

  • There is no change in risk (correct)
  • There is an increased risk
  • There is a decreased risk
  • The study is inconclusive

    • What does specificity measure in screening or diagnosis?

  • Ability to correctly exclude people without the condition (correct)
  • Ability to correctly exclude people with the condition
  • Ability to correctly identify people with the condition
  • Ability to correctly identify people without the condition

    • In odds ratio, what does a value greater than 1 suggest?

    <p>There is an increased risk</p> Signup and view all the answers

    What type of studies use relative risk as a measure?

    <p>Cohort studies</p> Signup and view all the answers

    What does an odds ratio of less than 1 suggest?

    <p>There is a decreased risk</p> Signup and view all the answers

    What does survival analysis primarily examine?

    <p>Duration of time until an event occurs</p> Signup and view all the answers

    What is the formula for calculating sensitivity in screening or diagnosis?

    <p>a/(a+c)</p> Signup and view all the answers

    Which statistical method examines the duration of time until an event occurs?

    <p>Survival analysis</p> Signup and view all the answers

    What is the formula for calculating specificity in screening or diagnosis?

    <p>d/(b+d)</p> Signup and view all the answers

    What is the x-axis of a Kaplan Meier Curve?

    <p>Time</p> Signup and view all the answers

    Which measure is used for cohort studies?

    <p>Relative risk</p> Signup and view all the answers

    What does it mean if the relative risk is less than 1?

    <p>There is a decreased risk</p> Signup and view all the answers

    What is the y-axis of a Kaplan Meier Curve?

    <p>Proportion of the sample that have not had the event</p> Signup and view all the answers

    Which measure is used to correctly screen out people without a certain condition?

    <p>Specificity</p> Signup and view all the answers

    What does a relative risk value of less than 1 indicate?

    <p>Decreased risk</p> Signup and view all the answers

    In odds ratio, what does a value greater than 1 suggest?

    <p>Increase in odds</p> Signup and view all the answers

    What is the primary purpose of survival analysis?

    <p>To examine duration until an event occurs</p> Signup and view all the answers

    What does sensitivity measure in screening or diagnosis?

    <p>Incidence of true positives</p> Signup and view all the answers

    In a Kaplan Meier Curve, what does the y-axis represent?

    <p>Proportion of the sample that have not had the event</p> Signup and view all the answers

    What type of studies use odds ratio as a measure?

    <p>Case-control studies</p> Signup and view all the answers

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