• Miho Iwamoto, Yasuharu Nakashima, Tomoyuki Nakamura, Yusuke Kohno, Ryosuke Yamaguchi, and Kazuyuki Takamura.
• Department of Orthopaedic Surgery, Kyushu University Graduate School of Medicine, Fukuoka, Japan.
• J Orthop Sci. 2018 Jan 1; 23 (1): 156-160.

BackgroundTreatment with a brace is the first choice as conservative treatment via the containment method for Legg-Calvé-Perthes disease (LCPD). The purpose of this study is to evaluate clinical outcomes and influential factors of conservative treatment with the non-weight-bearing abduction brace for LCPD.MethodsOne hundred thirty hips in 130 patients were examined in this study. The mean age at onset was 7.0 years (3.3-12.4 years) and the mean follow-up period was 8.4 years (4.1-17.6 years). The extent of necrosis and lateral collapse of the femoral head were evaluated using the Catterall classification and the lateral pillar classification, respectively. Radiological outcome was assessed as good (classes I and II), fair (III), and poor (IV), according to the modified Stulberg classification.ResultsRadiographic outcome at final follow-up was good in 82 hips (63%), fair in 40 hips (31%), and poor in 8 hips (6%). Multinomial logistic regression analysis showed that major influential factors for good outcomes were as follows: age at onset, lateral pillar classification, and Catterall classification. From the receiver operating characteristic curve, the cut-off value for age at onset was 8.4 years old to obtain good outcomes. Hips with Catterall group I and II and lateral pillar group A and B had significantly better results.ConclusionPatients younger than 8.4 years old at onset with lateral pillar group A or B or Catterall group I or II showed good outcomes with a non-weight-bearing abduction brace for LCPD. These results show that alternative treatment, such as surgery, may be another option for patients who are not included in the above groups.Copyright © 2017 The Japanese Orthopaedic Association. Published by Elsevier B.V. All rights reserved.

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