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BioMed Research International
Volume 2017 (2017), Article ID 7021862, 4 pages
Research Article

The Risk of Achilles Tendon Rupture in the Patients with Achilles Tendinopathy: Healthcare Database Analysis in the United States

1Department of Orthopedic Surgery, Teikyo University School of Medicine, Tokyo, Japan
2Hospital for Special Surgery, New York, NY, USA
3Department of Orthopedic Surgery, Tokushima University, Tokushima, Japan
4Albany Medical Center, Albany, NY, USA

Correspondence should be addressed to John G. Kennedy; ude.ssh@jydennek

Received 13 October 2016; Revised 18 January 2017; Accepted 9 February 2017; Published 30 April 2017

Academic Editor: Haining Zhang

Copyright © 2017 Youichi Yasui et al. 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.


Introduction. Disorders of the Achilles tendon can be broadly classified into acute and chronic entities. Few studies have established chronic Achilles tendinopathy as a precursor to acute Achilles ruptures. In this study, we assessed the relationship between Achilles tendinopathy and rupture, clarifying the incidence of rupture in the setting of underlying tendinopathy. Methods. The United Healthcare Orthopedic Dataset from the PearlDiver Patient Record Database was used to identify patients with ICD-9 codes for Achilles rupture and/or Achilles tendinopathy. The number of patients with acute rupture, chronic tendinopathy, and rupture following a prior diagnosis of tendinopathy was assessed. Results. Four percent of patients with an underlying diagnosis of Achilles tendinopathy went on to sustain a rupture (7,232 patients). Older patients with tendinopathy were most vulnerable to subsequent rupture. Conclusions. The current study demonstrates that 4.0% of patients who were previously diagnosed with Achilles tendinopathy sustained an Achilles tendon rupture. Additionally, older patients with Achilles tendinopathy were most vulnerable. These findings are important as they can help clinicians more objectively council patients with Achilles tendinopathy.