In subjects with I/H-PAH, the plasma bio-ADM level also tended to be higher in subjects who died compared to those who survived (median (IQR): 16.45 (8.90–24.23) pg/mL vs. 9.80 (6.50–24.10) pg/mL, p = 0.487). Here, ADM is linked to pulmonary arterial hypertension.