Table 1.

Comparison of the volumetric measurements of upper airways among different software tested

	Sample	Mean (cm3)	SD	Confidential Interval		F	Significance
				Lower Limit	Upper Limit
Mimics (a)	20	89.94 (d)	4.76	87.71	92.17	9.125	p < 0.001
ITK-Snap (b)	20	92.46 (f)	5.68	89.80	95.12
Invesalius (c)	20	88.40 (d.e)	4.72	86.19	90.61
Dolphin 3D (d)	20	96.01 (a,c,f)	6.36	93.03	98.98
Slicer 3D (e)	20	94.72 (c,f)	5.54	92.12	97.31
Seg3D (f)	20	86.72 (b,d,e)	5.10	84.34	89.12

*Significance set at p < 0.05 and based on one-way analysis of variance (ANOVA) and Scheffe's post-hoc comparisons tests; a, b, c, d, e, f = identifiers for post-hoc comparisons tests

SD standard deviation