Conversion factor for predicting adenoma detection rate from polyp detection rate vary according to colonoscopy indication and gender of endoscoped individuals

Adenoma detection rate (ADR) is the primary quality indicator for colonoscopy; however, it is difficult to obtain in terms of time and personnel. Polyp detection rate (PDR) is an alternative indicator easily evaluated from administrative data. The main aim of the study was to assess whether PDR and ADR are correlated and to determine the conversion factor to predict ADR from PDR in preventive (screening and FOBT+) colonoscopies.