Table 1 Formulae for height loss caused by the scoliosis (y equalling height loss in cms). The Bjure formula, which is logarithmic, has been changed to a form equivalent to the other formulae for clarity

Bjure

y = 10 ^{0.011x – 0.177}

x is Cobb angle of the major curve

Kono

y = (0.6 (x - 30) + 2.6)/10

x is combined Cobb of all curves

Ylikoski

y = (0.0062 x + 0.0024 x²)/10

x is combined Cobb of all curves

Stokes

y = (1 + 0.0066 x + 0.0084 x²)/10

x is mean Cobb of the largest two curves

Hwang

y = 0.059 x + 0.012z – 0.919

x is the major thoracic Cobb, z is T5 to T12 kyphosis