Table of Contents
ISRN Orthopedics
Volume 2011, Article ID 486512, 19 pages
http://dx.doi.org/10.5402/2011/486512
Review Article

The Epidemiology and Demographics of Slipped Capital Femoral Epiphysis

1Riley Children’s Hospital, Room 4250, 705 Riley Hospital Drive, Indianapolis, IN 46202, USA
2Department of Orthopaedic Surgery, Indiana University, Indianapolis, IN 46202, USA
3Ruth Lilly Medical Library, Indiana University School of Medicine, Indianapolis, IN 46202, USA

Received 15 May 2011; Accepted 11 June 2011

Academic Editors: C.-H. Lee, C. Mathoulin, K. S. Song, and H. Yuan

Copyright © 2011 Randall T. Loder and Elaine N. Skopelja. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The etiology of slipped capital femoral epiphysis (SCFE) is unknown with many insights coming from epidemiologic/demographic information. A systematic medical literature review regarding SCFE was performed. The incidence is 0.33/100,000 to 24.58/100,000 children 8 to 15 years of age. The relative racial frequency, relative to Caucasians at 1.0, is 5.6 for Polynesians, 3.9 for Blacks, and 2.5 for Hispanics. The average age is 12.0 years for boys and 11.2 years for girls. The physiologic age when SCFE occurs is less variable than the chronologic age. The average symptom duration is 4 to 5 months. Most children are obese: >50% are >95th percentile weight for age with average BMI is 25–30 kg/m2. The onset of SCFE is in the summer when north of 40°N. Bilaterality ranges from 18 to 50%. In children with bilateral involvement, 50–60% present with simultaneous SCFEs and those who present with a unilateral SCFE and subsequently develop a contralateral SCFE do so within 18 months. The age at presentation is younger for those who present with a unilateral SCFE and later develop a contralateral SCFE. The age-weight, age-height, and height test are useful to differentiate between an idiopathic and atypical SCFE.