Inclusion Criteria:  All subjects between 50 and 77 years diagnosed with an in situ or an invasive CRC Inhabitants of the Finistère area  Subjects were included by period:  from January 2016 to December 2017 for subjects with SD-CRC, non-responders and the excluded population from January 2016 to December 2019 for subjects with FIT-ICs (2-year interval) from January 2016 to December 2020 for subjects with post-colonoscopy IC from January 2018 to December 2020 for subjects with delayed diagnosis  Exclusion Criteria:  Subjects who refused to participate in the case of refusal of data collection Subject swith CRC other than adenocarcinoma were excluded.