Table 1 Comparison of general outcomes between the two groups.

From: Evaluation of postoperative drainage necessity in posterior atlantoaxial fixation via intermuscular approach for odontoid fracture

Variable

Group A(n = 40)

Group B(n = 68)

P

Age, years

43.7 ± 8.4

40.1 ± 10.0

0.058

Gender, no. (%)

  

0.260

Male

24 (60.0)

48 (70.6)

 

Female

16 (40.0)

20 (29.4)

 

Anderson-D’Alonzo classification, no. (%)

  

0.547

Type II

33 (82.5)

59 (86.8)

 

Type III

7 (17.5)

9 (13.2)

 

Grauer classification, no. (%)

  

0.900

Type IIB

8 (20.0)

15 (22.1)

 

Type IIC

25 (62.5)

44 (64.7)

 

Complicated injuries, no. (%)

  

0.997

Head injury

4 (10.0)

7 (10.3)

 

Thoracic trauma

2 (5.0)

3 (4.4)

 

Limb fracture

3 (7.5)

5 (7.4)

 

Solitary spinal process fracture between C3 and C7

2 (5.0)

4 (5.9)

 

Time from trauma to surgery, days

10.3 ± 5.0

11.9 ± 5.8

0.134

Average follow-up time, months *

20.3 ± 4.8

25.1 ± 1.8

<0.001*

  1. Data expressed as mean ± standard deviation unless otherwise indicated.
  2. * P<0.05, independent samples t-test, chi-square test or fisher’s exact test.