Definition of postconcussion syndrome (PCS)
Scale used | Number of positive symptoms to define the presence of a PCS | Number of studies (n, %) |
Rivermead Post-Concussion Symptoms Questionnaire | ≥1 | 3 (17) |
≥2 | 1 (5.5) | |
≥3 | 5 (28) | |
≥4 | 1 (5.5) | |
≥5 | 2 (11) | |
Not specified | 6 (33) |