Fig. 3From: Principal component analysis of the relationship between pelvic inclination and lumbar lordosisPlot of correlated variables at the commencement (a) and completion (b) of treatment by the PC1 and PC2. Pelvic obliquity, PO; pelvic inclination angle DL, PIA DL; pelvic inclination angle DR, PIA DR; pelvis rotation, PR; pelvis torsion, PT; apical deviation +max, AD+; apical deviation –max, AD−; lordotic angle, LA. Plots illustrate the magnitude of input value correlation respective to the PC1 and PC2 obtained at the commencement and completion of malalignment treatment; the contribution of PC1 and PC2 to total variance is illustrated in the scree plotsBack to article page