Table 4

Correlation (Pearson’s coefficient) between ILO score and ventilatory response to exercise

	Profusion	Number of zones affected	Opacity type “t” over “s”	Pleural thickening
p<0.05; p<0.01; p<0.001; **p<0.0001.
VO₂max, % pred	−0.38*	−0.30	−0.33*	−0.26
Desaturation	0.54***	0.55***	0.46**	0.20
Ve at 1 l/min	0.64****	0.28	0.44**	0.12
Ve at 50% of pred VO₂max	0.32	0.31	0.08	−0.25
Vd/Vt at VO₂max	0.62****	0.33*	0.38*	0.20