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Risk factors
By Mayo Clinic staff- Age. The disease affects primarily children and young adults, with the majority of cases occurring in children between 4 and 6 years of age.
- Sex. Henoch-Schonlein purpura is slightly more common in boys than girls.
- Race. White and Asian children are more likely to develop Henoch-Schonlein purpura than black children are.
- Illness. Having an upper respiratory infection or other bacterial or viral illness increases a child's risk.
- Season. Henoch-Schonlein purpura strikes mainly in autumn, winter and spring, and rarely in summer.
References
- McCarthy HJ, et al. Clinical practice: Diagnosis and management of Henoch-Schonlein purpura. European Journal of Pediatrics. 2010;169:643.
- Dedeoglu F, et al. Management of Henoch-Schonlein purpura. http://www.uptodate.com/home/index.html. Accessed Sept. 2, 2010.
- Dedeoglu F, et al. Clinical manifestations and diagnosis of Henoch-Schonlein purpura. http://www.uptodate.com/home/index.html. Sept. 7, 2010.
- Gedalia A, et al. Systemic vasculitis in childhood. Current Rheumatology Reports. 2009;11:402.
- Henoch-Schonlein purpura. Vasculitis Foundation. http://www.vasculitisfoundation.org/HenochSchonleinpurpura. Accessed Sept. 7, 2010.
- Henoch-Schonlein Purpura. National Kidney and Urologic Diseases Clearinghouse. http://kidney.niddk.nih.gov/kudiseases/pubs/HSP. Accessed Sept. 7, 2010.
- Niaudet P, et al. Renal manifestations of Henoch-Schonlein purpura. http://www.uptodate.com/home/index.html. Accessed Sept. 7, 2010.
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