Retrospective & Prospective Observational Study of Patients With Immune (Idiopathic) Thrombocytopenic Purpura (ITP)

Retrospective chart review for up to 36 months of enrollment date.

Quality of lige questionnaires as well as treatment satisfaction questionnaires are required monthly. Includes QOL, ITP-PAQ (immune thrombocytopenic purpura - patient assessment questionnaire), EQ-5D, and TSQM (Treatment Satisfaction Questionnaire for Medication).

Physician characteristics to be collected include demographics, years of practice, medical specialty or primary treating physician, and the referral process.