A retrospective study to evaluate the effectiveness and safety of 1L polyethylene glycol (PEG)+ Ascorbic acid given for bowel preparation before colonoscopy.

Observational, retrospective, and multicenter study based on the review of the existing medical records of patients followed on an outpatient basis (computerized databases and dissociated data).

The design implies the incorporation of existing anonymized data by the hospital centers without leaving any record of the code assigned to each patient. The design, therefore, avoids the possible risk of the dissemination of the personal data of patients.

Inclusion Criteria:

• Male and female outpatients aged: ≥18 years undergoing a screening, surveillance, or diagnostic colonoscopy between June 1, 2019, to September 1, 2021
• Who have used NER1006 in the preparation of the colonoscopy either in split doses or same day.

Exclusion Criteria:

• History of colorectal cancer o colectomy before the first colonoscopy
• Impossibility to obtain the required mandatory data

All outpatients aged: ≥18 years undergoing a screening, surveillance, or diagnostic colonoscopy who have prepared with NER1006