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Table 2 Radiographic parameters of patients in the two groups

From: Effects of different pedicle screw insertion depths on sagittal balance of lumbar degenerative spondylolisthesis, a retrospective comparative study

 

Group L (n = 52)

Group S (n = 36)

P Value

SD (mm)

   

PRE

17.56 ± 5.60

16.97 ± 5.14

0.620

1 MONTH

6.85 ± 2.97*

7.11 ± 3.22*

0.692

FINAL

8.00 ± 2.97*

9.47 ± 3.23*

0.002**

SL (°)

   

PRE

16.36 ± 4.23

16.78 ± 4.72

0.669

1 MONTH

25.25 ± 2.84*

24.69 ± 3.20*

0.394

FINAL

25.77 ± 2.74*

23.69 ± 2.81*

0.001**

LL (°)

   

PRE

39.08 ± 3.64

38.08 ± 3.61

0.210

1 MONTH

45.85 ± 4.09*

44.58 ± 4.01*

0.155

FINAL

45.50 ± 4.19*

43.36 ± 3.96*

0.018**

SS (°)

   

PRE

36.35 ± 4.99

34.78 ± 4.72

0.142

1 MONTH

37.98 ± 4.27*

36.58 ± 4.22*

0.133

FINAL

38.15 ± 4.51*

36.39 ± 5.02*

0.089

PT (°)

   

PRE

18.00 ± 4.91

18.83 ± 4.18

0.409

1 MONTH

14.87 ± 4.27*

15.69 ± 3.92*

0.357

FINAL

14.62 ± 4.97*

16.86 ± 5.35*

0.047**

PI (°)

   

PRE

54.35 ± 3.55

53.61 ± 3.49

0.339

1 MONTH

52.85 ± 3.72*

52.28 ± 3.92*

0.493

FINAL

52.77 ± 4.20*

53.25 ± 4.78

0.619

PI-LL (°)

   

PRE

15.27 ± 4.10

15.53 ± 2.78

0.743

1 MONTH

7.00 ± 4.51*

7.69 ± 3.82*

0.452

FINAL

7.27 ± 4.72*

9.89 ± 4.52*

0.011 **

  1. SD: slip degree; SL: segment lordosis; LL: lumbar lordosis; SS: sacral slope; PI: pelvic incidence; PT: pelvic tilt. PRE: preoperative, 1 MONTH: one month after surgery, FINAL: final follow-up
  2. * Significance compared with the preoperative, P < 0.05
  3. ** Significance between the two groups, P < 0.05