Legg-Calvé-Perthes syndrome epidemiology and demographics

Perthes is a relatively unusual condition, with only 4 per 100,000 children being affected.

It is most commonly seen in persons aged 3-12 years, with a median of 6 years of age.

Males are affected 4-5 times more often than females, suggesting a partial sex-linked genetic inheritance of the the syndrome. 1 in 100 male children of adults with Legg-Calvé-Perthes syndrome also exhibit the syndrome.

Caucasians are affected more frequently than other races.

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