FEV1 in litres | Patients with SpO2<90% (%) | Patients requiring supplemental oxygen (%) |
---|---|---|
<0.5 | 93 | 71 |
0.51–1.0 | 48 | 32 |
1.01–1.5 | 25 | 14 |
1.51–2.0 | 17 | 8 |
>2.0 | 10 | 5 |
Adapted from Jones and O'Driscoll21
FEV1, forced expiratory volume in 1 s; SpO2, pulse oximeter oxygen saturation.