Objectives: To establish normative reference data for the SCAT3 in professional Rugby Union players. Design: A cross sectional study in professional Rugby Union players competing in national and international professional competitions between 2015 and 2016. Methods: The SCAT3 was administered pre-season or prior to tournaments. Data was collected electronically using a custom tablet application. SCAT3 subcomponents distributions were described and normative ranges determined using percentile cut-offs for average, unusually low/high, and extremely low/high scores. The association between player characteristics and performance in SCAT3 subcomponents was also investigated in exploratory analyses. Results: A total of 3611 professional Rugby Union players were included. The most common baseline symptom was fatigue (14%). The symptom score median (md) was 0 (interquartile range (IQR) = 0-1). Symptom severity md was 0 (IQR = 0-1). The md of the SAC score was 28 (IQR = 26-29). The md of the MBESS was 2 (IQR = 0-4). The Tandem gait md was 11.1 s (IQR = 10.0-12.7 s). Upper limb coordination was normal in 98.4%. Younger age and lower educational level were associated with worse performance on delayed recall and reverse month sub-components of the SCAT3 (p < 0.0001). No statistically significant differences in SCAT3 subcomponents were evident across gender. Conclusions: Representative normative reference values for the SCAT3 among professional Rugby Union players are provided. Baseline performance on concentration and delayed recall tests may be lower in younger athletes or in those with lower educational level.
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