Table 1.

Descriptive statistics and results of Friedman’s test for comparison between relative errors of dry mandible volumetric measurements (%) by different software

Modality	Median	Minimum	Maximum	Mean	SD	P value	Effect size (w)
Mimics	− 8.2B	− 9.8	− 2.3	− 6.7	3.2	< 0.001*	0.769
OnDemand	− 9B	− 10	3.4	− 7	4.5
InVesalius	− 4.3C	− 9.4	− 1.9	− 4.7	2.4
Equation	− 22.7A	− 43.8	− 15.2	− 25.8	9.1

*Significant at P ≤ 0.05, different superscripts indicate statistically significant difference