Which of the following is used "to ensure balance in the mix of the treatment groups with regard to time of enrollment" and helps to control for "shifts in the nature of persons enrolled over the course of a trial"?

Question

Quizplus · Accepted Answer

Blocking is used to ensure balance in the mix of treatment groups with regard to time of enrollment and helps control for shifts in the nature of persons enrolled over the course of a trial.

Which of the Following Is Used "To Ensure Balance in the Mix