Type of complication

Group A

Group B

Group C

CSF leak

3

0

0

Persistent weakness

1

0

0

Persistent bladder dysfunction

1

0

0

Wound infection

1

1

0

Persistent LBP

1

0

0

Persistent radiculopathy

0

2

1

Discitis

0

1

0

Total no. of cases

21

47

49

Percentage of complications

33.3%

8.5%

2%