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Table 3 Stratification based on the postoperative change in PI between the IS and S2AI groups

From: Use of iliac screw associated with more correction of lumbar lordosis than S2-alar-iliac screw for adult spinal deformity

 

Subgroup (C)

Subgroup (NC)

IS

64 (57.7%)

p

S2AI

4 (12.9%)

p

IS

47 (42.3%)

p

S2AI

27 (87.1%)

p

Preop

53.3 ± 14.1

 

57.9 ± 10.8

 

56.3 ± 8.1

 

56.6 ± 11.8

 

Postop

59.1 ± 11.5

0.032

51.7 ± 8.9

0.029

53.1 ± 6.4

0.085

56.9 ± 12.4

0.911

Change

5.8 ± 6.5

 

−6.2 ± 9.3

 

− 3.2 ± 3.

 

0.3 ± 2.2

 
  1. IS Iliac screw, S2AI S2-alar-iliac screw, PI Pelvic incidence, Preop Preoperative, Postop Postoperative; change, postoperative - preoperative; Subgroup (C), postoperative change in PI ≥5°; Subgroup (NC), postoperative change in PI < 5°. The p value represents the comparison between the preoperative value and postoperative value