Spirometry Normal Values
ERS'93 Regressions
Male
Parameter
Unit
Equation
r
σ
IVC
L
6.10H - 0.028A - 4.65
0.56
0.92
FVC
L
5.76H - 0.026A - 4.34
0.61
1.00
TLC
L
7.99H -7.08
0.70
1.15
RV
L
1.31H + 0.022A - 1.23
0.41
0.67
FRC
L
2.34H + 0.009A - 1.09
0.6
0.99
RV/TLC
0.39A + 13.96
5.46
9.0
FRC/TLC
0.21A + 43.8
6.74
11.1
FEV1
L
4.30H - 0.029A -2.49
0.51
0.84
FEV1/VC
- 0.18A + 87.21
7.17
11.8
FEF 25-75%
L/s
1.94H - 0.043A + 2.70
1.04
1.71
PEF
L/s
6.14H - 0.043A + 015
1.21
1.99
FEF 25%
L/s
5.46H - 0.029A - 0.47
1.71
2.81
FEF 50%
L/s
3.79H - 0.031A - 0.35
1.32
2.17
FEF 75%
L/s
2.61H - 0.026A - 1.34
0.78
1.28
Female
Parameter
Unit
Equation
r
σ
IVC
L
4.66H - 0.026A - 3.28
0.42
0.69
FVC
L
4.43H - 0.026A -2.89
0.43
0.71
TLC
L
6.60H - 5.79
0.60
0.99
RV
L
1.81H + 0.016A-2.00
0.35
0.58
FRC
L
2.24H + 0.001A - 1.00
0.50
0.82
RV/TLC
0.34A + 18.96
5.83
9.6
FRC/TLC
0.10A + 45.1
5.93
9.8
FEV1
L
3.95H - 0.025A - 2.60
0.38
0.62
FEV1/FVC
-0.19A + 89.10
6.51
10.7
FEF 25-75%
L/s
1.25H - 0.034A + 2.92
0.85
1.40
PEF
L/s
5.50H - 0.030A - 1.11
0.90
1.48
FEF 25%
L/s
3.221H - 0.025A + 1.60
1.35
2.22
FEF 50%
L/s
2.45H - 0.025A + 1.16
1.10
1.81
FEF 75%
L/s
1.05H - 0.025A + 1.11
0.69
1.13
