TABLE III.

Interrater Reliability

Grade	Kappa	Standard Error	P Value
Internal test group
I	0.76	0.03	<0.0001
II	0.69	0.03	<0.0001
III	0.73	0.03	<0.0001
IVa	0.61	0.03	<0.0001
IVb	0.77	0.03	<0.0001
V	1.00	0.03	<0.0001
Overall	0.76	0.01	<0.0001
External test group
I	0.53	0.01	<0.0001
II	0.63	0.01	<0.0001
III	0.73	0.01	<0.0001
IVa	0.62	0.01	<0.0001
IVb	0.92	0.01	<0.0001
V	1.00	0.01	<0.0001
Overall	0.74	0.01	<0.0001