Table 4.

Intra-rater agreement of the classification systems

	Observers	Kappa	Agreement
AO/OTA 2007	1	0.28	Fair
	2	0.65	Substantial
	3	0.65	Substantial
	Mean	0.53	Moderate
AO/OTA 2018	1	0.38	Fair
	2	0.52	Moderate
	3	0.66	Substantial
	Mean	0.52	Moderate
Biyani	1	0.42	Moderate
	2	0.64	Substantial
	3	0.68	Substantial
	Mean	0.58	Moderate