Influence of Revision Surgeries and Revision Rate on Quality Indicators in Certified Centres for Joint Replacement (EndoProthetikZentren).

EPZ with fewer revisions do not have higher complication rates than centers with high numbers of revisions. Thus, the quantity of revisions has no influence on the quality of the outcome, considering that on the basis of the data of the EndoCert system no risk adjustment of patient-specific data was performed. Therefore the revisioin quotient of an EPZ shows that quantity is not equal with quality.