Abstract des Autors

Objectives: To determine the utility of the King–Devick (K–D) test in identifying sports-related concussion in semi-professional rugby players. Design: Descriptive cohort study. Methods: 176 male players were recruited from a semi-professional rugby union competition in New Zealand (NZ). Baseline K–D scores were obtained in the pre-season. Post-match K–D and Pitch Side Concussion Assessment Version 2 (PSCA2) scores were obtained in those with suspected concussion. Post-match K–D scores were also administered to selected control players. Results: 19 concussions in 18 players were analysed. In addition, 33 controls were used for analysis. A positive K–D test was identified in 53% of players with concussion post-match. Conversely, a positive test was identified in 33% of controls. The sensitivity and specificity of the K–D test was calculated as 53% and 69% respectively. The positive predictive value and negative predictive value was 48% and 73% respectively. The PSCA2 correctly identified 74% of concussions. The K–D test identified 3 cases not identified by the PSCA2. When the PSCA2 and K–D were combined, 89% of concussions were correctly identified. Conclusions: The K–D test does not appear to be effective if used as a stand-alone test for the diagnosis of concussion. However, if used alongside current side-line cognitive and balance tests, it may assist in more accurately diagnosing sports-related concussion. Further research should look to utilise the K–D test in in-match protocols to establish if this improves the diagnostic accuracy of in-match protocols for sports-related concussion.