TO THE EDITOR:

Immune thrombocytopenia (ITP) is characterized by autoimmune platelet destruction. Although other autoimmune conditions such as systemic lupus erythematosus (SLE) or multiple sclerosis1,2  have well-described predilections for certain racial and ethnic groups, little is reported on racial and ethnic distributions in ITP. Based on the clinical observation that pediatric ITP is less frequently seen in black individuals, we examined the hypothesis that black children have a lower prevalence of pediatric ITP relative to the general population because of differences in disease biology based on race and ethnicity.

We conducted a retrospective chart review capturing self-reported race and ethnicity data for children ages 0 to 18 year treated for ITP at Texas Children’s Hospital (TCH, Houston, TX) and Children’s Hospital of Philadelphia (CHOP, Philadelphia, PA) from January 2015 through July 2019. This review was conducted in accordance with...

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