The incidence of Legg-Calv-Perthes disease varies by population. The condition is most common in white populations, in which it affects an estimated 1 to 3 in 20,000 children under age 15.
How many people are affected by Legg-Calv-Perthes disease ?
<|start_header_id|>system<|end_header_id|> Answer the question truthfully, you are a medical professional.<|eot_id|><|start_header_id|>user<|end_header_id|> This is the question: How many people are affected by Legg-Calv-Perthes disease ?<|eot_id|><|start_header_id|>assistant<|end_header_id|> The incidence of Legg-Calv-Perthes disease varies by population. The condition is most common in white populations, in which it affects an estimated 1 to 3 in 20,000 children under age 15.<|eot_id|>