Others might be quite concerned about the toxicities associated with chemotherapy, especially side effects that may not show up for many years after treatment is complete (e.g., new cancers caused by the chemotherapy). They might choose to forego chemotherapy unless it has been proven to have a very large and likely benefit.
Many of us have had to weigh advantages (benefits) vs. disadvantages (risks) when buying a house or car or when / where to move. The same kind of thinking applies when making treatment choices.
It is important to make the choice that is right for you. Use your treatment and support teams to make these decisions.
Evidenced Based Medicine (EBM)
This is a term used to describe a process where medical decisions are made based on the best scientific evidence. It attempts to assess the quality of evidence relevant to the risks and benefits of various treatment choices (including lack of treatment).
EBM also recognizes that many aspects of medical care depend on individual factors such as quality and value-of-life judgments, which are only partially subject to scientific methods.