Table 6.

Intra-observer reproducibility and inter-observer reliability of 3D bony landmark identification.

Landmark	Intra-observer reproducibility			Inter-observer reliability
	Mean	r	p-value	Mean	r	p-value
N	0.43	0.95	0.001*	0.57	0.88	0.003*
Po	0.55	0.98	0.002*	0.38	0.89	0.008*
Porion A	0.30	0.94	0.009*	0.52	0.86	0.002*
Ba	0.25	0.94	0.004*	0.50	0.87	0.003*
Sor	0.41	0.97	0.003*	0.47	0.90	0.001*
Z	0.28	0.98	0.002*	0.44	0.96	0.004*
Or	0.42	0.98	0.006*	0.36	0.99	0.002*
U6	0.33	0.97	0.003*	0.51	0.91	0.008*

r is the Pearson correlation coefficient and *correlation is highly significant at p ≤ 0.05.