Table 2 Clinical results

 Lumbar pain

5.9 ± 2.45

1.6 ± 1.66

*P = 0.0036

 Radicular pain

6.2 ± 2.42

1.5 ± 1.69

*P = 0.0137

Oswestry Disability Index

Preoperative

Postoperative (6 mo)

Postoperative (12 mo)

20.98 ± 5.04

10.46 ± 4.67

7.89 ± 4.46

 Excellent

42 (79%)

 Good

7 (13%)

 Fair

3 (5%)

 Poor

1 (2%)

Mean estimated blood loss in ml

70.5 ± 19.4

Mean operative time in minutes

160.6 ± 25.5

 Cage migration without symptoms

3

 Dural tearing, hematoma, infection

0

 Internal organ injury, existing nerve root injury

0