TABLE 2.

Correlation of emPHasis-10 score and World Health Organization (WHO) functional class with walk distance and pulmonary haemodynamics

	6MWD m	ISWD m	Mean RAP mmHg	Cardiac index L·min−1·m−2	PVR Wood units
EmPHasis-10 score	−0.55# (n=659)	−0.50# (n=797)	0.21# (n=575)	−0.21# (n=525)	0.17# (n=550)
WHO functional class	−0.60# (n=653)	−0.59# (n=796)	0.18# (n=572)	−0.18# (n=523)	0.18# (n=548)

Correlation was assessed by Pearson or Spearman-rank tests as appropriate. 6MWD: 6-min walk distance; ISWD: incremental shuttle walk distance; RAP: right atrial pressure; PVR: pulmonary vascular resistance. ^#: p<0.001.