| 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