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Table 3 Pre- and Postoperative data of the 9 patients

From: Transoral intraarticular cage distraction and C-JAWS fixation for revision of basilar invagination with irreducible atlantoaxial dislocation

Case JOA (preop) JOA (postop) ADI (preop) ADI (postop) CMA (preop) CMA (postop) CL (preop) CL (postop) Bone fusion confirmed (month) Follow-up (month) Complication
1 12 16 9.6 1.3 136.5 160.4 8.5 5.1 6 24 No
2 10 15 8.3 1.8 143.5 162.6 3 12 No
3 6 11 10.3 3.0 98.5 153.2 14.5 3.8 3 20 No
4 8 13 9.8 0 112.7 148.1 10.7 2.9 9 30 No
5 11 16 6.9 0 125.2 165.0 6 27 No
6 8 12 8.5 1.5 105.1 158.4 6 9 No
7 10 15 8.3 0 120.8 140.8 7.5 −0.5 3 12 No
8 13 17 7.1 0.6 133.8 170.1 15.6 3.0 9 21 No
9 9 13 8.7 1.0 110.3 139.2 12.7 0 3 15 No
M ± SD 9.7 ± 2.2 14.2 ± 2.0 8.6 ± 1.2 1.0 ± 1.0 120.7 ± 15.3 155.3 ± 10.8 11.6 ± 3.3 2.4 ± 2.2    
t −25.931 21.243 −7.890 6.334    
p 0.000a 0.000a 0.000a 0.001a    
  1. aPaired-sample t-test
  2. JOA Japanese Orthopedic Association score; ADI atlas-dens interval; CMA cervicomedullary angle; CL distance between the top of the odontoid process and the Chamberlain line