Table 3. Changes in 6 min walking distance (6MWD) from baseline to the first follow-up visit in patients with idiopathic pulmonary arterial hypertension (IPAH) and patients with pulmonary hypertension associated with idiopathic interstitial pneumonia (PH-IIP).

	Total	IPAH	PH-IIP	p
6MWD improvement ≥20 m	58.8%	59.5%	54.2%	0.530
6MWD improvement ≥30 m	52.7%	53.8%	45.8%	0.353
6MWD improvement ≥40 m	44.5%	45.9%	35.4%	0.213
6MWD improvement ≥50 m	35.7%	36.4%	31.3%	0.522
Worsening in 6MWD	26.6%	26.3%	29.2%	0.726
No change in 6MWD (change 0–19 m)	14.6%	14.2%	16.6%	0.661