From: Random variation of inspiratory lung function parameters in patients with COPD: a diagnostic accuracy study
Parameter
Standardized slope (r)
P value (significance from zero slope)
FEV1
0.37
<0.0001
%FEV1
0.10
0.1 (NS)
IC
0.27
%IC
0.05
0.46 (NS)
FIV1
0.20
0.002
%FIV1
0.13
0.045
PIF
%PIF
0.24
0.0002
MIF50
0.22
0.0009
%MIF50
0.14
0.0267