Kai's has been diagnosed with an aggressive form of late stage cancer. The research says that a new oral chemotherapy will improve his chance of survival by 30% at six months though there are several side effects. His oncologist is recommending this treatment and says his other patients have responded well.  

Kai has acknowledged the research and doctor's suggestion and understands the benefits and disadvantages of taking versus not taking the oral chemotherapy. He has decided not to take the treatment as he is concerned about the side effects for what he considers a short additional period of life. 

The oncologist is pushing Kai to start the treatment.

Given what you know about evidence-based practice what is the appropriate action?