What is the annual incidence of immune thrombocytopenic purpura (ITP) in the US?

Updated: Jun 28, 2019
  • Author: Craig M Kessler, MD, MACP; Chief Editor: Srikanth Nagalla, MBBS, MS, FACP  more...
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Answer

The annual incidence of immune thrombocytopenic purpura (ITP) is estimated to be five cases per 100,000 children and two cases per 100,000 adults, [2] but these data are not from large population-based studies. Most cases of acute ITP, particularly in children, are mild and self-limited and may not receive medical attention. Therefore, estimated incidences of ITP are difficult to determine and are likely to understate the full extent of the disease. The age-adjusted prevalence of ITP in Maryland was reported as 9.5 per 100,000 persons by Segal and Powe. [25]


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