In contrast to the correlation matrix (Figure 4), the variables ‘CHOP motor score’ (r = 0.32), ‘contractures score’ (r = 0.30), ‘first symptoms sum’ (r = 0.22), ‘RULM score calc’ (r = 0.32), ‘SMA type’ (r = 0.20) and ‘SMN2 copies’ (r = 0.3) did not show high predictive power for scoliosis in the PPS matrix. The gene discussed is SMN2; the disease is scoliosis.