In a clinical trial, there are usually two groups of patients:
- those who receive the newer treatment (the intervention group)
- those who receive standard treatment (the control group).
Standard treatment is the currently recommended treatment. In some cases, standard treatment may be no treatment. This is called best-supportive care.
Two groups of patients are needed, to see whether the newer treatment is better than standard treatment. Women who take part in a clinical trial cannot choose whether to have the newer treatment or standard treatment.
There are no additional costs for people who join a clinical trial.