Table 5.

Dyspnea and other results for O2 users and O2 non-users among subjects whose SpO2 fell by <4 % during the walk

	O2 (N = 36)	No O2 (N = 82)	P
6MWD (feet)	944.9 ± 367.0	1385.3 ± 322.4	<0.0001
BMI	31.6 ± 6.8	27.6 ± 5.3	0.001
Borg Dyspnea	3.3 ± 1.6	2.3 ± 1.7	0.005
Borg Exertion*	2.7 ± 2.0	2.2 ± 1.7	0.20
HR baseline	81.3 ± 15.3	79.9 ± 14.7	0.64
HR at 6 min	99.6 ± 11.7	107.6 ± 15.6	0.007
HR rise	18.2 ± 16.1	27.6 ± 10.5	0.002
SpO2 baseline	96.6 ± 2.5	95.2 ± 1.9	0.0009
SpO2 at 6 min	95.2 ± 2.3	93.4 ± 2.1	<0.0001
SpO2 drop	1.1 ± 3.1	1.8 ± 1.0	0.18

Values are mean and standard deviation; 6MWD distance walked during six-minute walk test (6MWT), O2 completed 6MWT using supplemental oxygen, No O2 completed 6MWT without using supplemental oxygen, HR heart rate, SpO2 peripheral oxygen saturation; *N = 30 for O2 users and 67 for non-users