TABLE 6.
Atlantoaxial Arthrodesis Failure Rates by Graft Group.
| Graft group | No Fail (%) | Fail (%) | Total | P-value |
|---|---|---|---|---|
| Age = Adult (>18 yr) | ||||
| Structural autograft (Group 1) | 75 (87.2) | 11 (12.8) | 86 | |
| Structural allograft (Group 2) | 29 (82.9) | 6 (17.1) | 35 | |
| Nonstructural, any (Group 3) | 76 (93.8) | 5 (6.2) | 81 | |
| None documented (Group 4) | 41 (93.2) | 3 (6.8) | 44 | |
| Total | 221 (89.8) | 25 (10.2) | 246 | .21 |
| Age = Child (0-18 yr) | ||||
| Structural autograft (Group 1) | 15 (88.2) | 2 (11.8) | 17 | |
| Structural allograft (Group 2) | 5 (100.0) | 0 (0.0) | 5 | |
| Nonstructural, any (Group 3) | 14 (87.5) | 2 (12.5) | 16 | |
| None documented (Group 4) | 6 (85.7) | 1 (14.3) | 7 | |
| Total | 40 (88.9) | 5 (11.1) | 45 | 1.0 |