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Table 2 Linear regression of FEV1 on FVC and on FVC and age

From: A mathematical reason for FEV1/FVC dependence on age

FEV1 on FVC

FEV1 on FVC and age

females

females

FEV1 = 0.84·FVC – 0.23

FEV1 = 0.77·FVC + 0.28 – 0.0052·age

R2 = 92.0%, r = 0.96

R2 = 92.7%

males

males

FEV1 = 0.84·FVC – 0.36

FEV1 = 0.77·FVC + 0.32 – 0.0069·age

R2 = 93.1%, r = 0.96

R2 = 93.6 %

  1. FEV1 (liter)- forced expiratory volume in one second; FVC (liter) - forced vital capacity; r- the correlation coefficient, R2 – fraction of explained variance. For all values shown in the Table p < 0.0001.
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Respiratory Research

ISSN: 1465-993X

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