Become an
Expert in Spirometry

Spirometry reference values: situation in 2006

Predicted values for FEV1 in white malesDisplaying the predicted FEV1 in white males according to 30 different authors. reveals a quite worrying picture. For the same height and age predicted values may differ by 1 litre or more. Predicted values for children and adolescents are quite disjointed from those for adults. These prediction equations were used in many parts of the world for diagnostic purposes! A worrisome state of affairs.

Predicted FEV1 in white males. Derived from software downloadable from



Top of page | | | ©Philip H. Quanjer