Table 2.

Intrarater reliability of classification systems for Legg-Calve-Perthes disease

Classification system	ICC	95% CI
Herring (Examiner 1)	0.907	0.809–0.953
Herring (Examiner 2)	0.951	0.906–0.975
Herring (Examiner 3)	0.908	0.770–0.958
Catterall (Examiner 1)	0.915	0.840–0.955
Catterall (Examiner 2)	0.813	0.655–0.901
Catterall (Examiner 3)	0.810	0.659–0.899
Salter-Thompson (Examiner 1)	0.823	0.658–0.909
Salter-Thompson (Examiner 2)	0.751	0.562–0.865
Salter-Thompson (Examiner 3)	0.659	0.424–0.811

ICC = intraclass correlation coefficient.