COMPARATIVE STUDY
JOURNAL ARTICLE

Cross-sectional outcome analysis of athletes with chronic patellar tendinopathy treated surgically and by extracorporeal shock wave therapy

Koen H E Peers, Roeland J J Lysens, Peter Brys, Johan Bellemans
Clinical Journal of Sport Medicine 2003, 13 (2): 79-83
12629424

OBJECTIVE: To compare the outcome of chronic patellar tendinopathy treated surgically and by extracorporeal shock wave therapy.

DESIGN: Cross-sectional outcome analysis.

SETTING: University Hospital Pellenberg, Leuven, Belgium.

PATIENTS AND INTERVENTIONS: Of a total of 27 patients (28 knees) with chronic patellar tendinopathy, 13 were treated surgically, and 14 (15 knees) received extracorporeal shock wave therapy.

MAIN OUTCOME MEASUREMENTS: Functional outcome questionnaire: Victorian Institute of Sport Assessment score, Visual Analog Scale, and Roles and Maudsley classification.

RESULTS: At an average of 6 months of follow-up, the mean Victorian Institute of Sport Assessment and Visual Analog Scale scores for the extracorporeal shock wave therapy group were 78.8 +/- 28.7 and 9 +/- 2, respectively, which improved to 83.9 +/- 28.6 and 9 +/- 2, respectively, at 22.1 months. The surgery group scored 70.7 +/- 22.2 points on the Victorian Institute of Sport Assessment at an average of 26.3 months of follow-up (p = 0.41 and p = 0.18) and 8 +/- 3 on the Visual Analog Scale (p = 0.14). In the extracorporeal shock wave therapy group, 5 (33%) patients rated their pain status at 22.1 months as excellent, 5 (33%) as good, 2 (13%) as fair, and 2 (13%) as poor. In the surgery group, 4 (33%) evaluated the result as excellent, 3 (25%) as good, 3 (25%) as fair, and 2 as poor (17%).

CONCLUSIONS: Extracorporeal shock wave therapy shows a comparable functional outcome to surgery in a cross-sectional analysis of patients with chronic proximal patellar tendinopathy resistant to conservative treatment.

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