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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