The results of this systematic review identify the consistent and prevalent indicators of concussion and their associations , derived from the strongest evidence in the published literature .
BACKGROUND Currently , there is no evidence -based definition for concussion that is being uniformly applied in clinical and research setting s. OBJECTIVE To conduct a systematic review of the highest- quality literature about concussion and to assemble evidence about the prevalence and associations of key indicators of concussion .
The goal was to establish an evidence -based foundation from which to derive , in future work , a definition , diagnostic criteria , and prognostic indicators for concussion .
Symptoms and disability until 3 months after mild TBI
Objective : Examine frequency , character and course of symptoms until 3 months after MTBI and the relation between symptoms and disability . Methods : Prospect i ve cohort study of 122 consecutive patients with MTBI .  Symptom  assessment after 1 , 7 and 14 days and 3 months post-injury by use of Rivermead Post-concussional Question naire .  Disability assessment by use of Rivermead Head Injury Follow-up Question naire . Results : Patients reporting one or more symptoms declined from 86 % on day 1 to 49 % 3 months post-injury , when 25 % also reported change in one or more domains of everyday activities . Poor memory , sleep disturbance and fatigue were most commonly reported . Symptom and disability scores were correlated ( τ = 0.60 ; p < 0.001 ) . Early symptom load correlated with late symptom load ( τ = 0.38 ; p < 0.01 ) . Conclusions : Symptoms gradually decline post-injury . Symptoms correlate with disability at 3 months . Patients with early high symptom load are at risk for developing persisting complaints
The results of this systematic review identify the consistent and prevalent indicators of concussion and their associations , derived from the strongest evidence in the published literature .
BACKGROUND Currently , there is no evidence -based definition for concussion that is being uniformly applied in clinical and research setting s. OBJECTIVE To conduct a systematic review of the highest- quality literature about concussion and to assemble evidence about the prevalence and associations of key indicators of concussion .
The goal was to establish an evidence -based foundation from which to derive , in future work , a definition , diagnostic criteria , and prognostic indicators for concussion .