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Table 1 The general characteristics of included patients

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

Variables Minimum Maximum Mean SD
Demographic parameters
 Age (years) 10.00 19.00 14.76 2.04
 Risser sign (o) 0.00 5.00 3.30 1.46
 Gender (male/female) 35/67
 Lenke types (n)
  1A−/1AN/1A+/1B−/1BN/1CN 8/28/7/6/11/12
  2A−/ 2AN/2BN/2C−/2CN 6/10/8/3/3
 UIV-T1 (segment) (0/1/2/3/4/5) (n) 7/10/36/36/11/2
Coronal parameters
 Preoperative CAT (o) −8.00 20.00 3.28 3.57
 Postoperative CAT (o) −6.00 9.00 3.36 2.99
 Preoperative T1 tilt (o) −18.40 26.00 4.85 5.49
 Postoperative T1 tilt (o) −6.00 14.00 4.71 3.69
 Preoperative PTC (o) 3.00 63.00 27.31 10.23
 Postoperative PTC (o) 2.00 38.00 18.38 8.55
 Preoperative AVT of PTC (mm) 1.00 46.00 21.07 15.18
 Postoperative AVT of PTC (mm) 2.00 15.00 7.60 4.27
 Preoperative MTC (o) 18.00 104.00 48.15 11.87
 Postoperative MTC (o) 3.00 57.00 19.73 9.71
 Preoperative AVT of MTC (mm) 36.00 74.00 51.24 11.84
 Postoperative AVT of MTC (mm) 5.00 350 15.02 8.41
 Preoperative TL/LC (o) 5.00 58.00 28.80 11.45
 Postoperative TL/LC (o) 1.00 27.00 12.08 6.72
 Preoperative AVT of TL/LC (mm) 0.00 23.00 7.15 5.13
 Postoperative AVT of TL/LC (mm) 0.00 19.00 7.79 4.93
 Preoperative CB (mm) −16.35 40.00 11.94 9.70
 Postoperative CB (mm) −14.00 25.00 7.48 6.90
Shoulder balance
 Preoperative CA (o) −10.00 11.00 1.89 2.69
 Postoperative CA (o) −2.00 8.00 1.93 1.55
 Preoperative RSH (mm) −24.00 40.00 8.18 10.96
 Postoperative RSH (mm) −5.00 24.00 7.49 5.73
HRQOL
 Preoperative SRS-22 total score 3.20 4.40 3.92 0.25
 Postoperative SRS-22 total score 3.40 4.40 4.08 0.22