Table 4—

Measurement error and repeatability of lung diffusing capacity and its components for 31 subjects

VariableMeasurement error#Repeatability
DL,NO mL·min−1·mmHg−16.217.2
Dm,CO mL·min−1·mmHg−1+2.67.1
Dm,CO mL·min−1·mmHg−1§3.28.7
DL,CO mL·min−1·mmHg−11.23.2
Vc mL+4.713.0
Vc mL§3.59.7
  • DL,NO: diffusing capacity of the lung for nitric oxide; Dm,CO: membrane diffusing capacity for carbon monoxide; DL,CO: diffusing lung capacity for carbon monoxide. #: within-subject standard deviation for each variable was calculated as the square root of the mean squares error from the ANOVA summary table 30; : calculated as 2.77×within-subject standard deviation 30; +: when Dm,CO = DL,NO/2.42; §: when Dm,CO = DL,NO/1.97. Each variable was reported to the nearest tenth decimal place.