IMMUNE THROMBOCYTOPENIA (ITP) AND COVID-19: National Retrospective and Prospective Observational Investigation on the Incidence and Course of COVID-19 in Patients With Prior, Ongoing or de Novo ITP. Evaluation of the Impact of COVID-19 Pandemic on the Management of ITP

Multicenter retrospective and prospective observational study based on the collection - through pre-piloted electronic CRFs - of sequential anonymized data from principal Italian ITP centers representative of national geographical distribution, to evaluate, during a 2-years study period, both the cumulative incidence COVID-19 occurring in patients with prior or ongoing ITP (COVID-19 in ITP) and the cumulative incidence of de novo ITP manifesting during COVID-19 (ITP in COVID-19). Data will be collected to describe the clinical course of patients in the two groups. The enrolment period will last 24 months or terminate at the last day of 1-month-COVID-19 free in Italy, whichever comes first. Each patient will be followed up to the first visit scheduled as per common center practice, including at least six months after hospital discharge or end of quarantine home confinement.