Biases in Clinical Trials
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Questions and Answers

What is a potential issue when introducing variables into one group that are not present in the other?

  • It may be responsible for any differences in outcome observed (correct)
  • It reduces the risk of bias
  • It increases the reliability of the results
  • It increases the sample size

What is the term for a method where the participant is not aware whether they belong to the study or control group?

  • Single blind (correct)
  • Double blind
  • Open label
  • Triple blind

What type of blinding is used when the participant, investigator, and data analyzer are all unaware of the interventions?

  • Double blind
  • Quadruple blind
  • Triple blind (correct)
  • Single blind

What is the primary purpose of a systematic review?

<p>To provide a comprehensive summary of literature relevant to a research question (C)</p> Signup and view all the answers

What is the purpose of a research protocol in a systematic review?

<p>To minimize bias before starting the literature search (C)</p> Signup and view all the answers

What type of design is used when the same participants receive multiple interventions in a sequence?

<p>Within-subjects design (D)</p> Signup and view all the answers

What is a potential problem that can occur in a within-subjects design?

<p>Carryover effects (D)</p> Signup and view all the answers

What type of design is used when different groups of participants receive different interventions?

<p>Between-subjects design (B)</p> Signup and view all the answers

What type of design is used to study a sequence of events or outcomes over time?

<p>Time-series design (B)</p> Signup and view all the answers

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