Inclusion Criteria:  From January 2019 to September 2020, data from all consecutive adult (aged ≥ 18 years old) patients who underwent "open access" colonoscopy performed in our Digestive Endoscopy Unit (which is based in the Hospitals of Carpi, Castelfranco Emilia, Mirandola, Pavullo and Vignola) were collected using an electronic reporting system  Exclusion Criteria:  Pregnant of breastfeeding patients