. Author manuscript; available in PMC: 2013 May 6.

Published in final edited form as: Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2006 Aug 4;103(4):534–542. doi: 10.1016/j.tripleo.2006.04.008

Table II.

Repeated measurements accuracy. Difference between first and second measurements for 28 skulls

		2D measurement			3D measurement

Wire orientation	Skull side	Mean Difference (Mean Abs Diff)	SD	P value	Mean Difference (Mean Abs Diff)	SD	P value
Horizontal	Left	0.25	0.99	0.02	−0.02	0.56	0.71
		(0.50)	0.39		(0.34)	0.23
	Right	−0.24	1.01	0.03	−0.05	0.42	0.24
		(0.47)	0.34		(0.19)	0.14
Vertical	Left	0.02	0.84	0.8	0.07	0.38	0.08
		(0.56)	0.39		(0.25)	0.19
	Right	0.22	1.01	0.04	0.03	0.36	0.46
		(0.61)	0.47		(0.37)	0.23

2D, two dimensional; 3D, three-dimensional; mean abs diff, mean absolute value of difference (measurement–truth).