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Risk factors
By Mayo Clinic staffLegg-Calve-Perthes disease can affect children of nearly any age, but it's most common among boys ages 2 to 12. In fact, it's up to five times more common in boys. When girls develop Legg-Calve-Perthes disease, it tends to be more severe.
In addition, Legg-Calve-Perthes disease is most common in Asians, Eskimos and whites. The disease may be more likely in physically active children who are small for their age and in those who are exposed to secondhand smoke.
- Perthes disease. American Academy of Orthopaedic Surgeons. http://orthoinfo.aaos.org/topic.cfm?topic=A00070&return_link=0. Accessed Jan. 22, 1010.
- Legg-Calve'-Perthes disease. National Osteonecrosis Foundation. http://www.nonf.org/perthesbrochure/perthes-brochure.htm. Accessed Jan. 22, 2010.
- Hosalkar HS, et al. The hip. In: Kliegman RM, et al. Nelson Textbook of Pediatrics. 18th ed. Saunders Elsevier; 2007. http://www.mdconsult.com/das/book/body/179341369-5/942328489/1608/1578.html#4-u1.0-B978-1-4160-2450-7..50679-4--cesec26_12453. Accessed Jan. 22, 1010.
- Mercier LR. Legg-Calvé-Perthes disease. In: Ferri FF. Ferri's Clinical Advisor 2010. St. Louis, Mo.: Mosby; 2009. http://www.mdconsult.com/das/book/body/179341369-5/942328489/2088/368.html#4-u1.0-B978-0-323-05609-0..00021-6--sc0040_7585. Accessed Jan. 22, 2010.
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