Table 6
Stages of bronchiolitis obliterans syndrome
BOS stage
Lung Function parameters
BOS-0
FEV
1
>90% and FEF
25–75
75% of baseline
BOS-0p
FEV
1
81–90% and FEF
25–75
<75% of baseline
BOS-1
FEV
1
66–80% of baseline
BOS-2
FEV
1
51–65% of baseline
BOS-3
FEV
1
<50% of baseline