TABLE 6.

Intraobserver reproducibility of the AO Spine Upper Cervical Injury Classification System based on years of surgical experience and surgical subspecialty

	Surgical Experience				Surgical Subspecialty
	<5 yrs	5–10 yrs	11–20 yrs	>20 yrs	Orthopedic Spine Surgery	Neurosurgery	Other Surgery
Overall classification	0.74 (0.17)	0.69 (0.22)	0.69 (0.19)	0.70 (0.16)	0.71 (0.22)	0.69 (0.15)	0.68 (0.13)
Injury location	0.90 (0.12)	0.87 (0.24)	0.89 (0.22)	0.90 (0.13)	0.87 (0.22)	0.89 (0.14)	0.89 (0.08)
Injury type	0.70 (0.20)	0.65 (0.25)	0.67 (0.22)	0.66 (0.18)	0.68 (0.24)	0.66 (0.18)	0.62 (0.14)

Values are given as kappa coefficient (SD).