FVCFEV1FEV1/FVCFEF25-75
N (1st / 2nd test)300 / 274318 / 288300 / 274300 / 274
First test Z-score; mean (SD)0,74 (0.98)0,66 (1.01)-0,18 (0.88)-0,11 (1.01)
Second test Z-score; mean (SD)0,51 (0.94)0,41 (0.99)-0,21 (0.89)-0,27 (0.99)