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Table 3 Comparisons of demographic, coronal and shoulder balance parameters between PNT group (CAT5o) and non-PNT group (CAT<5o)

From: Postoperative neck tilt in Lenke 1 and 2 AIS patients after correction surgery: a novel predictive index

Variables

Postoperative neck tilt group

CAT5o (n = 41)

Postoperative non-neck tilt group

CAT<5o (n = 61)

P value

Demographic parameters

 Age (years)

14.81 ± 2.44

14.74 ± 1.78

0.897

 Risser sign (o)

3.12 ± 1.66

3.43 ± 1.31

0.305

 Gender (male/female)

15/26

20/41

0.692

 UIV-T1 (segment) (0/1/2/3/4/5) (n)

3/4/18/9/7/0

4/6/18/27/4/2

0.118

Coronal parameters

 Preoperative CAT (o)

3.78 ± 3.21

2.95 ± 3.78

0.252

 Preoperative T1 tilt (o)

5.16 ± 6.31

4.64 ± 4.90

0.640

 Postoperative T1 tilt (o)

6.02 ± 3.46

3.82 ± 3.60

0.003

 Preoperative PTC (o)

31.56 ± 8.06

24.46 ± 10.59

< 0.001

 Postoperative PTC (o)

22.76 ± 7.87

15.44 ± 7.73

< 0.001

Preoperative AVT of PTC (mm)

24.28 ± 14.07

18.82 ± 15.63

0.073

Postoperative AVT of PTC (mm)

10.29 ± 3.14

5.71 ± 3.95

< 0.001

 Preoperative MTC (o)

48.34 ± 9.39

48.02 ± 13.36

0.893

 Postoperative MTC (o)

17.85 ± 8.07

20.98 ± 10.55

0.111

 Preoperative AVT of MTC (mm)

53.81 ± 9.85

49.43 ± 12.83

0.066

 Postoperative AVT of MTC (mm)

15.52 ± 7.94

14.67 ± 8.78

0.615

 Preoperative TL/LC (o)

28.19 ± 12.93

29.21 ± 10.43

0.662

 Postoperative TL/LC (o)

10.63 ± 6.18

13.05 ± 6.94

0.075

 Preoperative AVT of TL/LC (mm)

7.21 ± 5.14

7.10 ± 6.22

0.819

 Postoperative AVT of TL/LC (mm)

8.01 ± 5.67

7.66 ± 4.10

0.743

 Preoperative coronal balance (mm)

12.63 ± 11.66

11.48 ± 8.20

0.560

 Postoperative coronal balance (mm)

4.32 ± 5.86

9.61 ± 6.76

< 0.001

Shoulder balance

 Preoperative CA (o)

1.29 ± 2.26

2.30 ± 2.90

0.062

 Postoperative CA (o)

1.76 ± 1.51

2.05 ± 1.58

0.352

 Preoperative RSH (mm)

8.37 ± 8.35

8.05 ± 12.47

0.887

 Postoperative RSH (mm)

6.80 ± 5.61

7.95 ± 5.81

0.325