Hypoxia inhalation test: blood gas levels and oxygen saturation at 530 m before and after inhalation of 15% oxygen for 15 min
| Subjects n | Before | After | p-value | |
| Pa,O2 kPa | 23 | 9.6 (7.4–12.0) | 6.9 (5.5–8.2) | <0.001 |
| Pa,CO2 kPa | 23 | 4.9 (4.1–6.0) | 5.0 (3.7–5.6) | 0.03 |
| Sa,O2 % | 23 | 95 (88–98) | 89 (82–94) | <0.001 |
Data are presented as median (range), unless otherwise stated. Pa,O2: arterial oxygen tension; Pa,CO2: arterial carbon dioxide tension; Sa,O2: arterial oxygen saturation.