People are three times more likely to undergo at-home colon cancer screening if they're provided a free test, a new study says. About 30% of patients mailed a free stool test kit completed their screening within six months, compared with about 10% of those who weren't sent a kit, researchers reported Monday in JAMA Network Open. Advertisement The kit, a fecal immunochemical test (FIT), uses antibodies to detect blood in stool. This blood is an early warning sign of colon cancer, and those who