Table 5. Comparison of intraobserver and interobserver κ values according to classification system.

Classification systems	Intraobserver agreement P-value	Interobserver agreement P-value
IDEAL, Frykman, Fernandez and AO	0.06	0.04
IDEAL versus Frykman	0.02	0.03
IDEAL versus Fernandez	0.21	0.82
IDEAL versus AO	0.13	0.03
Frykman versus Fernandez	0.17	0.02
Frykman versus AO	0.25	0.96
Fernandez versus AO	0.74	0.01

Fisher F-test.