Fig. 3

Results of RHC. a Comparison of changes in mPAP from baseline to month 6 between untreated and drug-treated patients with borderline or less severe PH. b Comparison of change in PVR from baseline to month 6 between untreated and drug-treated patients with borderline or less severe PH. Significant differences were seen between the untreated and drug-treated patients with borderline or less severe PH with regard to changes in mPAP, and PVR from baseline to month 6 (untreated vs. drug-treated: mean difference in mPAP, 4.71 vs. -2.60 mmHg, P = 0.0035; PVR, +1.60 vs. -0.69 woods, P = 0.0020)