Table 3.

Chest Wall Comparison

Variable	Measurement	Minimum	Maximum	Mean	SD	t	P
Chest wall measurement	Skin-rib 10 (mm)	25.123	39.915	32.779	4.362
	Skin-muscle 10 (mm)	17.586	27.940	22.945	3.053	68.468	0.0001
	Skin-rib 11 (mm)	25.153	34.817	30.023	2.839
	Skin-muscle 11 (mm)	17.607	24.372	21.016	1.987	96.351	0.0001
	Skin-rib 12 (mm)	25.001	29.960	27.429	1.493
	Skin -muscle 12 (mm)	17.500	20.972	19.200	1.045	167.355	0.0001

Applying paired sample t test.