TABLE 3.

Interobserver Reliability of AO Spine Validation Members Based on Overall Classification and Injury Subtype

AO Spine Upper Cervical Injury Classification	Kappa (κ)
	Assessment 1	Assessment 2
Overall	0.63	0.61
IA	0.75	0.70
IC	0.86	0.84
IIA	0.59	0.60
IIB	0.48	0.45
IIC	0.45	0.47
IIIA	0.69	0.67
IIIB	0.53	0.53
IIIC	0.80	0.76