Abstract
PURPOSE: To ascertain whether the Royal London Hospital test is reproducible, sensitive, and specific for diagnosis of patellar tendinopathy. METHODS: Fifteen consecutive athletes with patellar tendinopathy were prospectively enrolled and compared with a control group of 15 non consecutive athletes with Achilles tendinopathy. Two testers examined separately each patient, using manual palpation and the Royal London Hospital test for diagnosis of patellar tendinopathy. High resolution real time ultrasonography was used as standard for diagnosis of tendinopathy and assessment of tendon thickness. RESULTS: The palpation test presented significantly higher sensitivity compared to the Royal London Hospital test (98 vs 88%; P=0.01); specificity was 94% for the palpation test and 98% for the Royal London Hospital test (P>0.05). Positive and negative predictive values were 94 and 98% for palpation test, 98 and 89% for the Royal London Hospital test, respectively. The two tests showed good to very good intra-tester and inter-tester agreement. At ultrasonography, pathological patellar tendons were significantly thicker compared to controlateral healthy tendon (P<0.001). CONCLUSIONS: In symptomatic patients with patellar tendinopathy, the Royal London Hospital test showed lower sensitivity and higher specificity than manual palpation. Both tests should be performed for a correct clinical diagnosis of patellar tendinopathy. Imaging assessment should be performed as a confirmatory test. LEVEL OF EVIDENCE: III.