Table 1.

Mean values (±SD) of VDS%, VDP, and CV.

	VDS%	VDP	CV
		Mean Values
HV	3.03 ± 5.17%	2.72 ± 2.39%	0.42 ± 0.08
AMC	13.0 ± 10.3%	7.77 ± 5.27%	0.45 ± 0.08
COPD	47.4 ± 11.6%	24.7 ± 7.6%	0.75 ± 0.26
	p-values for comparisons between subject groups
HV, AMC	p < 0.0001	p < 0.0001	p = 0.34 a
HV, COPD	p = 0.0009	p = 0.0014	p = 0.0003
AMC, COPD	p = 0.0099	p = 0.0070	p = 0.0024

^anot statistically significant