Table 2. Inter and intra-observer reliability.

	Intraobserver		Interobserver
	A.A.	E.V.	Both
Number of cases	50	50	741
Score of agreement (%)	94%	93%	91%
Weighted Kappa (k)	0.92	0.88	0.89
Significance	P < 0.001	P < 0.001	P < 0.001