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Table 1 The clinical and surgical data of 56 patients

From: Surgical treatment for basilar invagination with irreducible atlantoaxial dislocation: transoral atlantoaxial reduction plate fixation vs occipitocervical fixation

Characteristic TARP group OF group P
Number of patients/n 35 21  
Sex/n(%)    .18
 Male 14 (40.0%) 9 (42.9%)  
 Female 21 (60.0%) 12 (57.1%)  
Age/y (range) 42.5 ± 15.6 (12–70) 38.6 ± 14.2 (14–71) .35
Symptom presentation/n (%)
 Extremities weakness 34 (97.1%) 19 (90.5%) .54
 Numbness 27 (77.1%) 13 (61.9%) .33
 Occipital and neck pain 22 (62.9%) 12 (57.1%) .67
 Dystaxia 13 (37.1%) 5 (23.8%) .30
 Dyspnea 5 (14.3%) 2 (9.5%) .70
 Others 11 (31.4%) 6 (28.6%) .82
Concomitant malformation/n (%)
 Atlas assimilation 29 (82.9%) 18 (85.7%) .78
 Klippel-Feil syndrome 10 (28.5%) 4 (19.0%) .12
 Chiari malformation 5 (14.3%) 2 (9.5%) .70
 Syringomyelia 13 (37.1%) 6 (28.5%) .51
Symptom treatment interval/months (range) 63.2 ± 50.4 (12–240) 49.9 ± 55.8 (6–240) .36
Operative time/min (range) 227.6 ± 61.5 (90–420) 325.2 ± 123.4 (150–600) <.01
Blood loss/ml (range) 123.1 ± 54.9 (50–250) 271.4 ± 142.8 (50–500) <.01
Postoperative complications/n (%) 3 (8.5%) 1 (4.7%) .59
 Pulmonary infections 1 (2.9%) 0  
 Deep vein thromboses 1 (2.9%) 0  
 Urinary tract infections 1 (2.9%) 1 (4.7%)  
Follow-up/months 36.6 ± 16.0 (12–72) 41.6 ± 18.1 (12–84) .29
  1. TARP Transoral atlantoaxial reduction plate, OF Occipitocervical fixation, Others Including dizziness, sleep apnea, tinnitus, hoarseness, dysfunction of excretion