This is an open-label, prospective, single arm, Phase IV interventional study to evaluate the HU-resistance/intolerance in PV patients who meet predictive parameters identified in the machine learning project PV-AIM.~The study consists of three periods: screening period, treatment period (observation for HU-resistance/intolerance) and follow-up (FU) period. Eligible participants will enter the treatment period (observation for HU-resistance/intolerance) and start receiving the de novo HU treatment. The maximum treatment duration for each participant in the study will be up to 15 months.~This study will be conducted in a total of 300 adult PV patients and approximately at 30 sites in Germany.
The purpose of this study is to confirm the predictive factors for hydroxyurea (HU) failure (hemoglobin (HGB) <15.5 g/dL (9.62 mmol/L) and red cell distribution width (RDW) ≥17%) identified by machine learning in the polycythemia vera advanced integrated model (PV-AIM) project in the real-life setting