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Table 5 Comparisons of radiological parameters and SRS-22 scores between immediate post-operation and last follow-up in Lenke 1 and 2 AIS patients with and without PNT

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

Variables

Immediate post-operation

Last follow-up

P value

Postoperative neck tilt group (n = 41)

 Coronal Parameters

  Postoperative CAT (°)

6.55 ± 1.19

5.33 ± 1.41

0.001

  Postoperative T1 tilt (°)

6.02 ± 3.46

4.34 ± 4.02

< 0.001

  Postoperative PTC (°)

22.76 ± 7.87

24.22 ± 8.11

0.307

  Postoperative AVT of PTC (mm)

10.29 ± 3.14

9.13 ± 2.86

0.038

  Postoperative MTC (°)

17.85 ± 8.07

19.01 ± 8.52

0.123

  Postoperative AVT of MTC (mm)

15.52 ± 7.94

15.23 ± 8.89

0.616

  Postoperative TL/LC (°)

10.63 ± 6.18

14.90 ± 8.17

0.002

  Postoperative AVT of TL/LC (mm)

8.01 ± 5.67

7.75 ± 6.02

0.441

  Postoperative coronal balance (mm)

4.32 ± 5.86

3.62 ± 4.04

0.146

Shoulder balance

  Postoperative CA (o)

1.76 ± 1.51

1.45 ± 1.18

0.251

  Postoperative RSH (mm)

6.80 ± 5.61

6.45 ± 4.87

0.222

Postoperative non-neck tilt group (n = 61)

 Coronal Parameters

  Postoperative CAT (°)

2.74 ± 1.56

3.01 ± 1.52

0.388

  Postoperative t T1 tilt (°)

3.82 ± 2.60

4.25 ± 3.19

0.551

  Postoperative PTC (°)

15.44 ± 7.73

17.21 ± 6.34

0.275

  Postoperative AVT of PTC (mm)

5.71 ± 3.95

5.22 ± 3.72

0.761

  Postoperative MTC (°)

20.98 ± 10.55

22.37 ± 8.67

0.430

  Postoperative AVT of MTC (mm)

14.67 ± 8.78

12.41 ± 7.48

0.178

  Postoperative TL/LC (°)

13.05 ± 6.94

15.18 ± 5.17

0.095

  Postoperative AVT of TL/LC (mm)

7.66 ± 4.10

7.31 ± 5.89

0.796

  Postoperative coronal balance (mm)

9.61 ± 6.76

7.83 ± 7.78

0.064

Shoulder balance

  Postoperative CA (°)

2.05 ± 1.58

1.12 ± 1.09

0.131

  Postoperative RSH (mm)

7.95 ± 5.81

6.40 ± 3.19

0.072