Table 3.

Regional density data at RV, FRC and TLC (means ±s.d., n= 7)

Lung volume	RV	FRC	TLC	Pvolume
Non-dependent density (g cm−3)	0.27 ± 0.10†	0.25 ± 0.10†	0.15 ± 0.03*†	0.0002
Intermediate density (g cm−3)	0.37 ± 0.11†	0.35 ± 0.13†	0.22 ± 0.05*†	0.0004
Dependent density (g cm−3)	0.43 ± 0.11†	0.41 ± 0.12†	0.17 ± 0.04*†	0.0001
Pregion	<0.0001	<0.0001	0.0001

P_volume, omnibus P for the effect of lung volume; P_region, omnibus P for the effect of lung region.

^*Significantly different from RV and FRC, P < 0.05

^†significantly different from the other 2 regions, P < 0.005.