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Table 3 Comparing sagittal parameters between preoperative 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 = 34) Balance (n = 22) P
Age (years) 15.4 ± 2.2 15.0 ± 2.0 0.465
Risser 3.3 ± 1.5 3.5 ± 1.3 0.524
Gender    0.625
 Female 21 15  
 Male 13 7  
PI (°)a 41.3 ± 9.2 49.2 ± 10.7 0.006
SS (°) 39.9 ± 7.0 38.9 ± 8.3 0.66
PT (°)a 1.4 ± 8.5 10.3 ± 4.3 0.000
LL (°) 52.5 ± 10.9 47.9 ± 9.7 0.786
PI-LL (°)a −11.2 ± 13.7 1.2 ± 6.7 0.000
TK (°) 26.5 ± 15.6 25.8 ± 10.8 0.865
SVA (mm) −14.4 ± 34.5 0.2 ± 18.6 0.078
  1. PI pelvic incidence, SS sacral slope, PT pelvic tilt, LL lumbar lordosis, TK thoracic kyphosis, SVA sagittal vertical axis, LIV lower instrumented vertebra
  2. ameans significant different