Maxillofacial Plastic and Reconstructive Surgery

Table 2 The interside discrepancies of distances from porion (Po) to orbital plane or frontal plane (Orb or Fro)/external auditory meatus (EAM) to Orb or Fro at the downward-canted (right) and upward-canted (left) side

From: Positional symmetry of porion and external auditory meatus in facial asymmetry

Discrepancies		Group I	Group II-A	Group II-B	p value
Vertical	Orb-Po	0.24 ± 1.78	−0.59 ± 2.73	−0.13 ± 2.13	0.554
Vertical	Orb-EAM	0.25 ± 1.88	−0.60 ± 1.84	0.79 ± 1.94	0.099
	p value	0.985	0.981	0.001*
Horizontal	Fro-Po	−0.04 ± 2.18	−0.11 ± 2.30	0.62 ± 3.34	0.611
Horizontal	Fro-EAM	−0.13 ± 2.87	0.17 ± 2.10	−0.05 ± 2.45	0.755
	p value	0.876	0.633	0.110

Mean ± standard deviation, mm, One way ANOVA and paired t test
Po porion, EAM external auditory meatus, Orb orbital plane, Fro frontal plane, * denotes statistical difference (p < 0.05)

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