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Table 1 All patients’ demographics and radiographic parameters

From: The correlations between the anchor density and the curve correction of adolescent idiopathic scoliosis surgery

  All Lenke 1 Lenke 2 Lenke 3 Lenke 4 Lenke 5 Lenke 6
Patients 127 (17M&110F) 59 (7M&52F) 19 (3M&16F) 12 (1M&11F) 6 (2M&4F) 22 (3M&19F) 9 (1M&8F)
Age 14.4 (10~24) 14.3 (10~22) 15.8 (11~24) 13.0 (11~15) 13.3 (12~15) 14.7 (11~23) 14.8 (11~22)
Level fused 9.9 ± 2.2 8.9 ± 1.1 12.2 ± 1.4 12.0 ± 2.1 13.3 ± 0.8 7.7 ± 1.1 11.9 ± 1.3
PreOP major curve 57.4° ± 13.3° 52.7° ± 8.2° 63.1° ± 10.9° 65.7° ± 14.6° 92.5° ± 13.0° 50.3° ± 6.2° 58.3° ± 10.9°
PostOP major curve 20.8° ± 8.6° 19.2° ± 5.6° 23.9° ± 7.7° 25.9° ± 5.7° 40.7° ± 15.6° 15.3° ± 6.2° 18.3° ± 5.3°
PreOP TK 20.8° ± 11.3° 17.8° ± 9.9° 20.4° ± 11.9° 25.2° ± 11.9° 29.5° ± 17.9° 24.4° ± 9.6° 20.7° ± 11.8°
PostOP TK 24.9° ± 10.2° 22.8° ± 8.1° 21.4° ± 9.4° 26.2° ± 9.7° 26.3° ± 17.4° 34.1° ± 9.3° 20.0° ± 9.1°
PreOP LL 54.0° ± 11.7° 53.7° ± 11.7° 52.3° ± 10.6° 55.4° ± 9.7° 53.5° ± 11.4° 54.9° ± 13.9° 55.2° ± 13.6°
PostOP LL 56.3° ± 12.2° 55.3° ± 11.3° 54.0° ± 11.9° 62.7° ± 12.7° 50.3° ± 6.0° 59.0° ± 14.9° 57.0° ± 11.2°
PreOP AVR 2.2 ± 0.6 1.9 ± 0.5 2.3 ± 0.6 2.0 ± 0.6 2.7 ± 0.8 2.7 ± 0.5 2.8 ± 0.7
PostOP AVR 1.4 ± 0.7 1.1 ± 0.5 1.6 ± 0.8 1.3 ± 0.5 2.3 ± 1.0 1.5 ± 0.7 1.4 ± 0.7
PreOP CB (mm) -7.9 ± 17.0 -6.4 ± 14.6 2.8 ± 13.5 -15.3 ± 16.3 2.8 ± 12.4 -15.1 ± 21.5 -19.9 ± 13.5
PostOP CB (mm) -8.8 ± 12.5 -9.3 ± 12.5 -1.6 ± 13.0 -11.6 ± 8.2 -6.7 ± 8.6 -11.1 ± 13.1 -12.3 ± 14.2
PreOP SB (mm) -19.3 ± 32.9 -21.3 ± 32.8 -22.2 ± 35.5 -9.4 ± 27.9 -18.3 ± 48.6 -15.1 ± 33.5 -24.0 ± 25.6
PostOP SB (mm) -14.6 ± 33.5 -16.0 ± 34.7 -14.9 ± 32.9 -11.5 ± 27.8 -11.6 ± 32.1 -12.0 ± 40.2 -17.3 ± 22.3
PreOP AVT (mm) 49.6 ± 13.8 45.1 ± 11.5 50.5 ± 13.4 46.8 ± 15.4 68.4 ± 19.5 57.0 ± 11.1 50.8 ± 13.3
PostOP AVT (mm) 23.2 ± 10.9 20.3 ± 9.1 23.9 ± 14.0 24.3 ± 10.2 40.1 ± 11.1 24.6 ± 10.0 24.1 ± 8.5
Anchor densitya 1.60 (1.14~2) 1.59 (1.18~2) 1.48 (1.14~1.64) 1.61 (1.29~2) 1.67 (1.43~1.93) 1.74 (1.50~2) 1.59 (1.46~1.83)
Flexibility (%) 36.1 ± 19.3 36.1 ± 17.5 30.4 ± 13.1 18.0 ± 12.1 12.6 ± 8.7 51.9 ± 16.1 49.8 ± 20.8
Correction rate (%) 64.1 ± 10.1 63.6 ± 9.4 62.2 ± 9.3 59.9 ± 7.5 56.9 ± 11.1 69.8 ± 11.1 68.0 ± 10.0
Correction index 3.2 ± 5.2 3.0 ± 5.7 2.5 ± 1.1 6.5 ± 5.9 9.2 ± 10.7 1.6 ± 1.0 1.7 ± 1.1
TK correction 4.1° ± 9.7° 5.0° ± 9.9° 1.1° ± 7.0° 1.0° ± 7.9° -3.2° ± 11.5° 9.8° ± 8.5° -0.7° ± 11.3°
LL correction 2.4° ± 11.0° 1.6° ± 11.0° 1.7° ± 9.7° 7.3° ± 15.0° -3.2° ± 12.3° 4.0° ± 10.6° 1.8° ± 6.6°
AVR correction 0.8 ± 0.6 0.7 ± 0.5 0.7 ± 0.5 0.8 ± 0.6 0.3 ± 0.8 1.2 ± 0.7 1.3 ± 0.7
AVT correction (mm) 26.5 ± 11.9 24.8 ± 10.8 26.6 ± 14.3 22.5 ± 12.8 28.4 ± 15.1 32.4 ± 10.7 26.6 ± 10.4
  1. Data are presented as mean ± standard deviation (SD)
  2. M male, F female, OP operative, TK thoracic kyphosis, LL lumbar lordosis, AVR apical vertebral rotation, AVT apical vertebral translation, CB coronal balance, SB sagittal balance
  3. aAnchor density is presented as mean anchor density and its range