Table 3.

Principal Component Analysis.

Principal Component	1	2	3	4	5	6
Variance Explained	0.2374	0.1729	0.1325	0.1199	0.0825	0.0665
Cumulative Variance		0.4103	0.5428	0.6627	0.7452	0.8117
*Variables	Facial Plane to SN (SN-NPg) (°)	Mn Unit Length (Co-Gn) (mm)	L1 Protrusion (L1-APg) (mm)	IMPA (L1-MP) (°)	U1 - NA (°)	FH - SN (°)
	N-Pg ∥ HP (mm)	Post Facial Ht (mm) (Co-Go)	L1 - NB (mm)	Mx/Md Diff (Co-Gn - Co-ANS) (mm)	U1 - NA (mm)	Saddle/Sella Angle (SN-Ar) (°)
	Y-Axis (N-S-Gn) (°)	Midface Length (Co-A) (mm)	Lower Lip to ST N Perp (FH) (mm)	Chin Angle (Id-Pg-MP) (°)	A to N Perp (FH) (mm)	Occ Plane to FH (°)
	N-B ∥ HP (mm)	Mx Unit Length (Co-ANS) (mm)	L1 - NB (°)	Wits Appraisal (AO-BO) (mm)	SNA (°)	Upper Lip to ST N Perp (FH) (mm)
	SNB (°)	Ramus Height (Ar-Go) (mm)	Pg - NB (mm)	Facial Taper (N-Gn-Go) (°)	N-A ∥ HP (mm)	Lower Lip to ST N Perp (FH) (mm)

^*Variables making the greatest contribution to the respective principal component.