From the NEJM:
The percentage of U.S. residents with up-to-date screening for colorectal cancer has not increased appreciably since 2010 and remains at approximately 60%. To achieve the highest level of adherence to colorectal cancer screening, it may be best to provide participants a choice, because the “best” strategy is the one that they will adhere to consistently.
The NEJM reviews all the options in this table:
Full article is here:
Screening for Colorectal Neoplasia - Now@NEJM http://buff.ly/2ikfKA0