Table 1.

Inter-rater agreement of AO/OTA 2007

AO/OTA 2007	Observers	Kappa	Agreement
First examination	1 vs. 2	0.55	Moderate
	1 vs. 3	0.32	Fair
	2 vs. 3	0.39	Fair
	Mean	0.42	Moderate
Second examination	1 vs. 2	0.43	Moderate
	1 vs. 3	0.26	Fair
	2 vs. 3	0.45	Moderate
	Mean	0.38	Fair
Total	Mean	0.40	Fair