Two recently released studies confirm an alarming reality, that a majority of Americans who should be getting screened for colorectal cancer are not. According to a study in the journal Cancer, among an assessment of Medicare beneficiaries between 1998 and 2004, only 25.4 percent of people were screened, despite Medicare coverage for colorectal cancer screening. Figures released by the Agency for Healthcare Research and Quality show that only half of Americans age 50 and over have had a screening colonoscopy.