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Factors previously associated with a history of prior concussions*
| Patients with previously undiagnosed concussions | Patients without previously undiagnosed concussions | p-value | |
|---|---|---|---|
| Loss of consciousness n/N (%) | 41/134 (30.6) | 69/317 (21.8) | 0.038 |
| Mean PCSS† score at initial visit | 33 | 25 | 0.004 |
| Mean symptom duration (days) | 44 | 30 | 0.177 |
PCSS = Post-Concussion Symptom Scale from the international consensus on concussion in sports (total score at initial visit)
