Table 2

Variables with significant correlation to PaO2 during HAST, n=100

Variablerp Value
Baseline PaO2, kPa0.60<0.001
Exercise SpO2, %0.49<0.001
Baseline SpO2, %0.47<0.001
6MWT, distance, m0.270.007
Age, years−0.270.006
FEV1, litres0.220.027
  • 6MWT, 6 min walk test; FEV1, forced expiratory volume in 1 s; HAST, hypoxia-altitude simulation test; PaO2, arterial oxygen pressure; SpO2, arterial oxygen saturation by pulse oximetry.