[Spirographic predicted values for young men in Poland].

Basing on results of VC and FEV1 measurements in 293 males of the age group 15-40 years using the regression calculations new predictive values were calculated. These values were compared with values published 27 years earlier by Nikodemowicz and Morris's normograms. The latter published the highest reference values, on which most computer programs are based on. The analysis demonstrated significantly higher predictive values compared to those of Nikodemowicz, and comparable with the Morris's normograms. It seems that the latter can be used for reference values in Poland.