Table 3. Mean difference between two measurements made by the same observer.

Method = CBCT
Variable a	Specimens (N)	Mean (mm)	Standard deviation	Min. (mm)	Max. (mm)	Median (mm)	P-value
Diff_M12	12	−0.09	0.19	−0.44	0.16	−0.12	0.1119
Diff_M13	12	−0.09	0.33	−0.63	0.41	0.02	0.3402
Diff_M23	12	−0.00	0.26	−0.33	0.51	−0.01	0.9826

Method = Physical
Variable a	Specimens (N)	Mean (mm)	Standard deviation	Min. (mm)	Max. (mm)	Median (mm)	P-value
Diff_M12	12	−0.06	0.29	−0.44	0.30	−0.13	0.4714
Diff_M13	12	−0.00	0.46	−0.70	0.66	−0.09	0.9976
Diff_M23	12	0.06	0.27	−0.27	0.50	0.05	0.4524

CBCT, cone beam CT. ^aDiff_M12 = Measurement1–Measurement2; Diff_M13 = Measurement1–Measurement3; Diff_M23 = Measurement2–Measurement3