This is an international study looking back at patient information to understand how essential thrombocythemia (ET) changes into polycythemia vera (PV). Researchers are studying patients who were diagnosed with ET (a condition where your body makes too many platelets) and later developed PV (a condition where your body makes too many red blood cells). They are comparing these patients to others who had ET but did not develop PV. The goal is to learn more about the factors that lead to this change and how it affects patients over time. This study is for adults aged 18 to 100 who had ET and then developed PV by the end of 2020. The study aims to enroll 678 participants.

Study design

This is an observational study, meaning researchers are looking at existing medical records. It includes two parts: a nested case-control study and a comparative retrospective cohort study, involving 678 participants.

What's involved

Not specified in the trial record.

Compensation

Not stated in the trial record.

Follow-up

The primary endpoints, a nested case-control study and a comparative retrospective cohort study, are measured up to the baseline.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.