Intraobserver and interobserver reliability of Catterall, Herring, Salter???Thompson and Stulberg classification systems in Perthes disease

Abstract

The results of our study suggest the use of Catterall and Salter-Thompson systems prior to treatment and the Stulberg system at the end of the treatment at skeletal maturity. However, evaluation of the patients during the treatment period is still a dilemma and necessitates a new more reliable classification system.