Prevalence of Obesity in Patients With Legg-Calvé-Perthes Disease

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Introduction: Children with Legg-Calvé-Perthes disease classically have been described as thin, small, and socioeconomically disadvantaged. Despite the obesity epidemic, no study has determined the prevalence of obesity in this patient population and its effect on treatment.

Methods: This is a retrospective study of 150 patients (172 hips) with Legg-Calvé-Perthes disease seen between 2009 and 2014. Patients were grouped based on body mass index at the initial visit. This cohort was analyzed on the basis of the treatment received and socioeconomic status.

Results: Of 150 patients with Legg-Calvé-Perthes disease, 16% were overweight and 32% were obese. Patients who were obese had a 2.8 lower likelihood of receiving a bony operation (confidence interval: 1.1 to 7.7). Obesity in patients with the disease was associated with later Waldenström stage at presentation (P = 0.003), lower median household income by zip code (P < 0.001), and greater use of government-funded health insurance (P < 0.001).

Discussion: Obesity is common in patients with Legg-Calvé-Perthes disease and is associated with a later stage of disease presentation.

Level of Evidence: Level III

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