Table 1 Breakdown of disease
|  | Rheumatoid arthritis (n = 33) | Non-rheumatoid arthritis (n = 25) | p value |
|---|---|---|---|
Male:female | 8: 25 | 16: 9 | 0.0023* |
Age (years) | 63.6 ± 11.5 (27–76) | 55.6 ± 10.5 (13–72) | 0.1267 |
Pathology | Rheumatoid arthritis 33 | Idiopathic 7 | Â |
Traumatic 7 | |||
Os odontoideum 5 | |||
Klippel-Feil 4 | |||
Athetoid cerebral palsy 2 | |||
Anterior atlanto-axial subluxation | 30 | 22 | 0.4168 |
Anterior atlanto-subluxation + vertical subluxation | 2 | 0 | 0.8882 |
Posterior atlanto-axial subluxation | 1 | 3 | 0.4168 |
With subaxial lesion | 8 | 3 | 0.4011 |
Operating time (min) | 166.2 ± 43.5 (114–260) | 189.0 ± 52.8 (100–277) | 0.1750 |
Bleeding (mL) | 242.1 ± 268.0 (15–1255) | 178.9 ± 185.5 (36–609) | 0.3750 |
Follow-up period (months) | 88.33 ± 60.2 (24–210) | 109.5 ± 81.7 (24–262) | 0.4474 |