| |
FVCa
|
FEV1
b
|
FEV0.75
c
|
FEV0.5
d
|
MEF75
e
|
MEF50
f
|
MEF25
g
|
|---|
|
N
|
458
|
576
|
680
|
766
|
458
|
458
|
458
|
|
Mean (%)
|
2.0
|
2.2
|
2.2
|
2.1
|
6.0
|
9.1
|
16.3
|
|
Max (%)
|
12.4
|
13.6
|
13.7
|
14.1
|
51.9
|
51.9
|
92.3
|
|
0–5% (%)
|
90.8
|
90.8
|
92.1
|
90.9
|
65.0
|
41.1
|
23.9
|
|
6–10% (%)
|
8.1
|
8.5
|
7.5
|
8.4
|
19.4
|
33.5
|
20.2
|
|
10%+ (%)
|
1.1
|
0.7
|
0.4
|
0.8
|
15.6
|
25.3
|
56.0
|
- aFVC = forced vital capacity;
- bFEV1= forced expiratory volume in one second;
- cFEV0.75 = forced expiratory volume in 3/4 of a second;
- dFEV0.5 = forced expiratory volume in half a second;
- eMEF75 = instantaneous expiratory flow when 25% of FVC has to be expired
- fMEF50 = instantaneous expiratory flow when 50% of FVC has to be expired
- gMEF25 = instantaneous expiratory flow when 75% of FVC has to be expired
