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Table 4 Comparing sagittal parameters between final sagittal balance and imbalance Lenke 5 AIS patients (n = 56)

From: Coronal and sagittal balance in Lenke 5 AIS patients following posterior fusion: important role of the lowest instrument vertebrae selection

  Imbalance (n = 18) Balance (n = 38) P
Age 15.7 ± 2.3 14.9 ± 2.0 0.203
Risser 3.4 ± 1.6 3.4 ± 1.3 0.861
Gender    0.348
 Female 10 26  
 Male 8 12  
PI (°)a 37.7 ± 9.4 48.0 ± 9.5 0.000
SS (°) 34.1 ± 7.2 36.7 ± 7.4 0.23
PT (°)a 3.5 ± 9.3 11.3 ± 6.1 0.001
LL(°) 50.4 ± 8.6 51.1 ± 8.5 0.764
PI-LL(°)a −12.7 ± 12.6 −3.1 ± 7.0 0.001
TK(°) 31.9 ± 14.1 30.5 ± 11.8 0.694
SVA (mm) −15.3 ± 29.2 −10.0 ± 21.7 0.465
LIV (level)    0.259
 L3 2 10  
 L4 8 15  
 L5 8 13  
  1. PI pelvic incidence, PT pelvic tilt, LL lumbar lordosis, TK thoracic kyphosis, SVA sagittal vertical axis, LIV lower instrumented vertebra
  2. ameans significant different means significant different