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Table 1 The total number of concussion signs observed during the event, comparing those who were/were not diagnosed with a concussion and those who did/did not return to play

From: A video review of multiple concussion signs in National Rugby League match play

   Total number of signs p value Cohen’s d effect size
Medically diagnosed with concussion? Yes
(n = 60)
3.4 (1.3) .046 0.35
No
(n = 96)
3.0 (0.9)
Returned to play during the game? Yes
(n = 80)
2.9 (0.9) .002 0.50
No
(n = 76)
3.4 (1.2)