Baseline characteristic
We screened 3,255 hospitalized COVID-19 patients and identified 30 patients with chronic ITP and had been admitted to the hospital. Of all patients, eighteen (60%) were male, and the median age was 68 year old (IQR: 64-77). Hypertension (73%) and diabetes (50%) were the most common comorbidities. At the time of COVID-19 diagnosis, nine (30%) patients had an active malignancy and three (10%) patients had a history of autoimmune diseases which were SLE, Takayasu arteritis, and Hashimoto’s thyroiditis. Shortness of breath and fever were the main reasons for hospital presentation; 50%, and 30% respectively. The median platelet count at the time of admission was 120 x 109/L (IQR: 110-166). Of all patients, only six (20%) were admitted to ICU and four (13.3%) required mechanical ventilation. None of the patients had bleeding at the time of admission or had a splenectomy in the past.