iPFT Parameter z-score Mean (95% CI) z-score Range
FVC -0.39 (-0.68 to -0.1) -4.89 to 1.86
FEV0.5 -0.05 (-0.46 to 0.35) -5.49 to 1.82
FEF25/75 0.37 (-0.05 to 0.8) -3.25 to 3.25
FEF75 0.09 (-0.3 to 0.49) -3.12 to 2.68
Respiratory Rate 1.42 (0.95 to 1.89) -0.6 to 5.33
TV -0.2 (-0.54 to 0.14) -1.99 to 2.4
FRC 2.18 (1.48 to 2.88) -1.21 to 9.4