Table 3

Effects of 5 minutes of oxygen or air breathing immediately after 6 minute walk

OxygenAirMean differencep value95% CI
Values are mean (SE) with 95% confidence limits for differences.
Sao2=oxygen saturation; VAS=visual analogue scale.
Sao2 (%) at 5 min92.7 (1.1)89.9 (1.2)2.7<0.0001+1.1 to +3.1
VAS (mm) at 5 min14 (3.6)19 (5.7)5NS−11 to +1
Subjective recovery time (s)182 (33.1)151 (17.7)31NS−23 to +85
Objective recovery time (s)215 (38.4)164 (17.9)51NS−37 to +139