Table 3.

The multiplevariate variable selection

Model Size	R-squared	R-squared change	Variable names
1	0.646231	0.646231	Sacral_slope
2	0.829647	0.183416	Sacral_slope, T9_tilt
3	0.872109	0.042462	Kyphosis, sacral_slope, T9_tilt
4	0.894606	0.022497	Kyphosis, sacral_slope, Incidence, T9_tilt