ecrin-mdr-crcClinical2020polyps and colorectal cancerPolyps And Colorectal CancerObservationalhttps://newmdr.ecrin.org/Study/2442983Netherlands3ECRIN MDRRecruitingfalsePre-endoscopic identification of patients at risk for inadequate bowel preparation to reduce the need for repeat colonoscopy procedures: external validation of a prediction model (PAYBACK-score)Primary outcome(s): Accuracy of the prediction score Study Design: N/A: single arm study, Open (masking not used), N/A , unknown, Other2020-03-152442983NL8451