Several important variables help determine the quality of evidence. "Blinding" is one of them. Blinding relates to what factor affecting quality of evidence?
A) The sample size is large enough to show an effect of the intervention.
B) The outcomes being measured accurately.
C) The research or evaluator not knowing if a participant is in the experimental or control group.
D) The attrition rate of the subjects.

Question

Quizplus · Accepted Answer

Blinding refers to the research or evaluator not knowing if a participant is in the experimental or control group. This helps to prevent bias in the results and therefore improves the quality of evidence. Sample size, accurate outcome measurements, and attrition rate are all important variables, but they do not directly relate to blinding.

Several Important Variables Help Determine the Quality of Evidence