News Stool tests like Cologuard are gaining popularity over colonoscopy. Which should you get? November 29, 2022 Karen Weintraub, USA TODAY Comments Off on Stool tests like Cologuard are gaining popularity over colonoscopy. Which should you get? Colonoscopy is recommended for people over 45, but preparation turns off many. Here's a look at how it compares to stool tests FIT and Cologuard.