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Table 3 Bochum reference formulas for ventilatory lung function in healthy non-smoking males aged 20 to 90 years (n = 251).

From: Time for new reference values for ventilatory lung function

Parameter Reference formula r2 RSD 1.64 · RSD
VC Y = 0.0631.H - 0.0312.A - 4.960 0.73 0.58 0.96
FVC Y = 0.0615.H - 0.0308.A - 4.673 0.74 0.58 0.96
FEV1 Y = 0.0431.H - 0.0346.A - 2.114 0.78 0.49 0.81
FEV1 %FVC Y = -0.1141.H - 0.2001.A + 110 0.32 5.72 9.38
PEF Y = 0.0742.H - 0.0538.A + 1.3032 0.47 1.60 2.63
MEF75 Y = 0.0579.H - 0.0227.A - 1.3032 0.08 1.73 2.85
MEF50 Y = 0.0211.H - 0.0449.A + 3.270 0.41 1.26 2.07
MEF25 Y = 0.0205.H - 0.0400.A - 0.800 0.31 0.68 1.12
  1. H - body height (cm); A - age (years)