Study patients
Inclusion criteria: The enrolled cases were all hospitalized newly diagnosed ITP patients who had platelet-specific antibodies tests before the onset of treatment. The diagnosis of ITP was accorded to the international consensus guidelines 12. The baseline platelet counts in all cases were less than 10×109/L. The children were aged from 1 month to 198 months. The diagnosis of ITP was done in less than one month. All patients were without a history of taking special platelet elevation drugs.
Exclusion criteria: Thrombocytopenia caused by other diseases, such as infection-related thrombocytopenia, congenital immune thrombocytopenia, connective tissue disease, aplastic anemia, and others was excluded. Patients having a history of taking special platelet elevation drugs were excluded. Patients who requested a withdrawal from the study were excluded from the analysis.