Kaplan-Meier survival of patients with SCD with and without PHTN.

The upper (red) line is the survival estimate for SCD patients without PHTN, that is, with normal MPAP. The lower (blue) line is the survival estimate for SCD patients with PHTN, that is, with MPAP more than 25 mm Hg. The x-axis measures months of follow-up after cardiac catheterization.