OBJECTIVES: To evaluate the effect of decision aids DAs for metastatic colorectal cancer mCRC patients in the Arabic language. ...Patients were recruited from 4 main oncology centers in Saudi Arabia: King Fahad Medical City, Riyadh King Khalid University Hospital, Riyadh King Saud Medical City, Riyadh and King Fahd Specialist Hospital, Dammam, Saudi Arabia, between March 2016 and October 2018. ...