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Table 4 The related risk factors of the patients with TOLF in 2 groups

From: Clinical effect analysis of laminectomy alone and laminectomy with instrumentation in the treatment of TOLF

Characteristics

Group A(n = 77,54.2 %)

Group B(n = 65,45.8 %)

P value

Preoperative duration of symptoms(months)

19.17 ± 10.36

26.81 ± 12.14

0.013*

OLF segment

  

0.987

  Upper thoracic(T1−4)

7

6

 

  Middle thoracic (T5−8)

4

3

 

  Lower thoracic(T9−12)

66

56

 

Intramedullary signal change on MRI

  

<0.001*

  Yes

14

52

 

  No

63

13

 

Dural ossification

  

0.007*

  Yes

4

13

 

  No

73

52

 

Residual rate of cross-sectional spinal canal area on CT

  

<0.001**

  ≤60 %

19

50

 

  >60 %

58

15

 

Shape on the sgittal MRI

  

0.002*

  Beak

45

21

 

  Round

32

44

 

Operation time (min)

  

<0.001**

  ≤250

51

17

 

  >250

26

48

 

Blood loss (ml)

493.33 ± 164.39

614.81 ± 193.56

0.013*

Pre-mJOA

6.37 ± 1.59

5.19 ± 1.78

0.010*

Post-mJOA

   

  At 6 months

7.87 ± 1.17

7.74 ± 1.26

0.697

  At 1 year

8.23 ± 1.33

8.15 ± 1.06

0.792

  At last follow-up

8.26 ± 1.05

8.29 ± 1.17

0.920

JOA improvement rate 

  At 6 months

32.79 ± 20.65

39.15 ± 21.14

0.073

  At 1 year

38.32 ± 21.49

46.86 ± 20.69

0.018*

  At last follow-up

38.53 ± 20.72

47.12 ± 20.71

0.054

Complications

Wound infected

  

0.765

  Yes

7

5

 

  No

70

60

 

Delayed wound healing

  

0.426

  Yes

9

5

 

  No

68

60

 

Leakage of cerebrospinal fluid

  

0.013*

  Yes

4

12

 

  No

73

53

 

Neurological deficit

Nil

Nil

 

Recurrence

Nil

Nil

 

Intercostal pain

  

0.439

  Yes

6

3

 

  No

71

62

 

Thrombosis of lower extremities

  

0.934

  Yes

5

4

 

  No

72

61

 

Others

  

0.426

  Yes

9

5

 

  No

68

60

 
  1. mJOA Modified Japanese Orthopaedic Association
  2. *The difference possessing statistical significance
  3. *P < 0.05,**P = 0.000
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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