WASHINGTON — A blood-based screening test detected colorectal cancer with a sensitivity of 79.2% and a specificity of 91.5% among average-risk adults aged 45 to 85 years, according to research presented at Digestive Disease Week. “Adherence to colon cancer screening tests is suboptimal with current options of stool-based tests and colonoscopy,” Aasma Shaukat, MD, MPH, director