What is randomisation in clinical studies and why is it used?

In clinical studies, randomisation refers to the process by which participants are randomly assigned to different groups. This method, also known as randomisation, ensures that the groups are comparable and that there are no systematic differences that could falsify the results.

The objective is to objectively assess the effect of the treatment by minimising external influences. In a typical clinical study, there is a treatment group that receives the new therapy and a control group that receives either a standard treatment or a placebo - i.e. a substance that has been proven to have no effect.

Randomisation ensures that the characteristics of the study participants, such as age or state of health, are evenly distributed between the two groups. This increases the validity and reliability of the study results, as differences in the results can more likely be attributed to the treatment being investigated rather than to pre-existing differences between the groups.

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