A Real-world Study of Treatment Patterns and Outcomes in Primary Immune Thrombocytopenia Patients Treated With Eltrombopag

Inclusion criteria: HCP inclusion criteria: 1. A licensed HCP (e.g., internal medicine specialist, hematologist, hematologist-oncologist or immunologist etc.) involved in the management of adult patients with primary ITP. 2. Actively involved in treatment decision-making for primary ITP patients at the time of the study. 3. Have a minimum of 3 years of experience managing patients with primary ITP. 4. Currently, managing an average of at least 2 adult primary ITP patients per month, including those treated with eltrombopag. 5. Able and willing to complete a web-based survey (approximately 60 to 70 minutes) and abstract data from 2 eligible patient charts. 6. Practicing in one of the study countries (US, UK, or Germany). 7. Have access to a computer or mobile device with internet connectivity to complete the survey. 8. Not listed as inactive or retired in the panel database. Patient-level inclusion criteria: 1. Confirmed diagnosis of primary ITP. 2. Aged ≥18 years at the time of diagnosis. 3. Received first-line corticosteroid therapy (with or without intravenous immune globulin \[IVIg\]). 4. Initiated eltrombopag treatment (with or without corticosteroids) as first non-steroidal ITP treatment between 01 January 2020 and 31 December 2024. 5. Have at least 6 months of follow-up data available after the index date (unless deceased within that period). Exclusion criteria: HCP exclusion criteria: 1. Currently employed by a pharmaceutical company or regulatory authority involved in the approval or marketing of treatments for primary ITP. 2. Unable to provide data for patients who meet the study's inclusion criteria. 3. Not currently managing patients with primary ITP or are not involved in treatment decisions for these patients. Patient-level exclusion criteria: 1\. Diagnosis of Evans syndrome, secondary ITP, or non-immune thrombocytopenia.