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Table 3 Summary of the principal components analysis

From: Classification and characterization of class III malocclusion in Chinese individuals

Principal component

1

2

3

4

5

6

Variance explaineda

0.20586

0.19340

0.12168

0.10028

0.06596

0.04932

Cumulative varianceb

 

0.39926

0.52094

0.62122

0.68718

0.73650

Variablesc

Posterior Facial Height (Co-Go) (mm)

GoGn-SN (°)

LI-NB (°)

Na _|_ to A point (mm)

UI-SN (°)

Wits Appraisal (AO-BO) (mm)

 

Upper Face Height (N-ANS) (mm)

MP-SN (°)

LI-NB (mm)

Pg to Na Perpendicular (mm)

U1-FH (°)

Convexity (NA-APg) (°)

 

Midface Length (Co-A) (mm)

Facial Taper (N-Gn-Go) (°)

L1 Protrusion (L1-APg) (mm)

Facial Angle (FH-NPg) (°)

U1-NA (°)

Overbite (mm)

 

LPDH (L6-MP) (mm)

Gonial Angle (Ar-Go-Me) (°)

L1 Protrusion (L1-APg) (°)

N to B through the horizontal plane (mm)

U1-NA (mm)

Facial angle (G' - Sn - Pog') (°)

 

LADH (LI-MP) (mm)

Post-Ant Face Height (S-Go/N-Me) (%)

FMIA (L1-FH) (°)

N to A through the horizontal plane (mm)

Occlusal plane to FH (OP-PoOr) (°)

Articular Angle (S-Ar-Go) (°)

  1. arepresents the variance explained by each principal component in PCA
  2. bshows the cumulative variance explained by each added PC sequentially
  3. cdisplays the variables contributing the most in each PC