Table 1 The clinical and surgical data of 56 patients
Characteristic | TARP group | OF group | P |
|---|---|---|---|
Number of patients/n | 35 | 21 | Â |
Sex/n(%) | Â | Â | .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 |