clinical trials 3.8 Flashcards
what is produced in clinical trials
drugs or vaccines
why are drugs and vaccines subjected to clinical trials
to establish their safety and effectiveness before being licensed for use
why are subjects divided into groups randomly
to reduce bias in the distribution of characteristics such as age and gender
what happens in a double blind trial
both the subject nor the researcher knows which group the subjects are in to prevent biased interpretation of results
why does one group receive a placebo control
to ensure valid comparison
why must groups be a suitable size
to reduce the magnitude of experimental error
what happens at the end of the trial
the results from the two groups are compared to determine whether there are any statistically significant differences between the groups
