TABLE 2

Pearson correlation coefficients

FVC % predictedDLCO# % predicted6MWD
Mean PAP
 Pearson coefficient0.047−0.16−0.20
 p-value0.300.001<0.001
 Paired observations n87487483
FVC % predicted
 Pearson coefficient0.430.20
 p-value<0.0001<0.0001
 Paired observations n488484
6MWD
 Pearson coefficient0.36
 p-value<0.0001
 Paired observations n484
  • FVC: forced vital capacity; DLCO: diffusion capacity of the lung for carbon monoxide; 6MWD: 6-min walk distance; PAP: pulmonary arterial pressure. #: adjusted for haemoglobin.