TABLE 4.
Interobserver reliability 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 | |
| Assessment 1 |
|
|
|
|
|
|
|
| Global |
0.67 |
0.62 |
0.61 |
0.62 |
0.64 |
0.63 |
0.43 |
| IA |
0.76 |
0.80 |
0.70 |
0.73 |
0.77 |
0.73 |
0.31 |
| IC |
0.85 |
0.83 |
0.86 |
0.91 |
0.88 |
0.83 |
0.61 |
| IIA |
0.63 |
0.54 |
0.56 |
0.62 |
0.60 |
0.59 |
0.31 |
| IIB |
0.51 |
0.48 |
0.45 |
0.43 |
0.50 |
0.47 |
0.27 |
| IIC |
0.50 |
0.46 |
0.42 |
0.38 |
0.44 |
0.48 |
0.13 |
| IIIA |
0.76 |
0.67 |
0.66 |
0.66 |
0.69 |
0.69 |
0.40 |
| IIIB |
0.58 |
0.56 |
0.49 |
0.49 |
0.53 |
0.54 |
0.47 |
| IIIC |
0.84 |
0.77 |
0.80 |
0.77 |
0.78 |
0.82 |
0.83 |
| Assessment 2 |
|
|
|
|
|
|
|
| Global |
0.62 |
0.61 |
0.61 |
0.59 |
0.62 |
0.63 |
0.36 |
| IA |
0.63 |
0.79 |
0.71 |
0.64 |
0.69 |
0.75 |
0.38 |
| IC |
0.86 |
0.82 |
0.82 |
0.86 |
0.86 |
0.85 |
0.43 |
| IIA |
0.59 |
0.58 |
0.61 |
0.59 |
0.61 |
0.61 |
0.31 |
| IIB |
0.47 |
0.47 |
0.43 |
0.40 |
0.47 |
0.43 |
0.23 |
| IIC |
0.49 |
0.49 |
0.40 |
0.49 |
0.46 |
0.48 |
0.27 |
| IIIA |
0.69 |
0.65 |
0.70 |
0.62 |
0.67 |
0.70 |
0.38 |
| IIIB |
0.59 |
0.51 |
0.54 |
0.48 |
0.56 |
0.53 |
0.48 |
| IIIC | 0.74 | 0.76 | 0.77 | 0.80 | 0.74 | 0.83 | 0.52 |
The pooled reliability is 0.63 for assessment 1 and 0.61 for assessment 2. Values are given as kappa coefficients.