BACKGROUND The frequency of polypectomy is an important indicator of quality assurance for population-based colorectal cancer screening programs. Although administrative databases of physician claims provide population-level data on the performance of polypectomy, the accuracy of the procedure codes has not been examined. We determined the level of agreement between physician claims for polypec...

Since 1961 the Scottish Home and Health Department has collected and processed morbidity information relating to all non-obstetric and non-psychiatric discharges from National Health Service hospitals in Scotland. The information is used for planning, administrative, and epidemiological purposes and it is therefore essential that its reliability is assessed. The present study was carried out to...