Table 6 Complications in all patients and between groups

Total no. of complications

33/89

45/145

78/234

0.341

No. of patients with at least one complication

14

23

37

0.815

No. of patients with at least one implant-related complication

12

23

35

0.372

No. of complications per patient

1.43

1.25

1.32

No. of implant-related complications per patient

0.87

1.11

1.02

Complication rate per surgical procedure (%)

37.1

31

33.3

Implant-related complication rate per surgical procedure (%)

22.5

27.6

25.6

Implant-related complications

20/89

40/145

60/234

0.384

Implant dislodgement

5/89

5/145

10/234

0.426

Implant loosen

3/89

11/145

14/234

0.3

Rod fracture

3/89

14/145

17/234

0.072

Proximal junctional kyphosis

9/89

10/145

19/234

0.382

No. of patients with more than two complications

6

14

20

0.311

Neurological complication (no.)

2/89

1/145

3/234

0.667

Surgical site infection (no.)

4/89

1/145

5/234

0.051

Superficial

2/89

0/145

2/234

0.144

 Deep

2/89

1/145

3/234

0.667

Other complications

7/89

3/145

10/234

0.033

 Pulmonary problems

5/89

1/145

6/234

0.059

 Gastrointestinal

1/89

2/145

3/234

1

 Dural tear

1/89

0/145

1/234

0.38