Table 5 Comparison of perioperative parameters between the good and poor prognosis groups

Intraoperative Blood Loss (mL)

298.54 ± 52.34

300.54 ± 51.69

0.251

0.802

Surgical Time (min)

148.54 ± 12.64

147.67 ± 16.91

0.367

0.715

Postoperative Hospital Stay (days)

5.33 ± 1.10

5.41 ± 1.23

0.45

0.653

Screw Inclination Angle (°)

17.26 5.13

15.14 ± 5.33

2.663

0.008

Screw Tail Tilt Angle (°)

10.25 ± 3.64

10.49 ± 3.29

0.443

0.658

Rod Contour (n, %)

0.049

0.825

- Bent

88 (68.75%)

45 (70.31%)

- Straight

40 (31.25%)

19 (29.69%)

Surgical Segment (n, %)

0.407

0.982

-L1/2

12 (9.38%)

5 (7.81%)

-L2/3

15 (11.72%)

8 (12.50%)

-L3/4

25 (19.53%)

11 (17.19%)

-L4/5

40 (31.25%)

20 (31.25%)

-L5/S1

36 (28.13%)

20 (31.25%)

Screw Placement (n, %)

2.069

0.150

- Left

76 (%)

31 (%)

- Right

52 (%)

33 (%)