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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