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Table 1 The mathematical formulas to calculate Cobb angles

From: Application of two-parameter scoliometer values for predicting scoliotic Cobb angle

Study Parameter Formula Correlation value (r)
Korovessis et al. [10] TI TC = 1.62 TI + 6.30 0.414
LI LC = 1.58 LI + 7.36 0.649
Sapkas et al. [11] TI TC = 20.461 + 0.13 TI2 0.685
LI, H LC = 70.46 − 0.639 H + 5.707 LI 0.215
Coelho et al. [23] ATR C = − 6.3 + 2.7 ATR 0.7
The current study TI, LI TC = 2.6 TI − 1.4 LI 0.931
TI, LI LC = − 1.5 TI + 2.0 LI 0.874
  1. TC = predicted thoracic Cobb angle, LC = predicted lumbar Cobb angle, TI = apical thoracic scoliometer value, LI = apical lumbar scoliometer value, H = body height, C = Cobb angle, ATR = axial trunk rotation