• Solrun Sigurdardottir, Nada Andelic, Cecilie Roe, Tone Jerstad, and Anne-Kristine Schanke.
• Sunnaas Rehabilitation Hospital, University of Oslo, Nesoddtangen 1450, Norway. solrun.sigurdardottir@sunnaas.no
• Brain Inj. 2009 Jun 1;23(6):489-97.

Primary ObjectivesTo examine self-reported post-concussion symptoms from 3-12 months post-injury in adults with traumatic brain injury (TBI) and to identify predictors of these symptoms.Methods And ProceduresA 1-year prospective study in Eastern Norway including 115 persons (16-55 years), with mild, moderate and severe TBI. The Rivermead Post Concussion Symptoms Questionnaire (RPQ) and Hospital Anxiety and Depression Scale (HADS) were administered. Magnetic resonance imaging (MRI) was performed at 12 months.ResultsIn the whole sample of TBI, 27.8% of cases developed post-concussion syndrome (PCS) at 3 months and 23.6% at 12 months post-injury. The mild and moderate groups showed a decline of PCS symptoms over time, in contrast to the severe TBI group. Greater levels of somatic, cognitive and anxiety symptoms at 3 months, as well as shorter PTA duration, were found to be important predictors for the severity of PCS symptoms at 12 months. Intracranial pathology, Glasgow Coma Scale (GCS) and demographic variables were not related to the severity of PCS symptoms.ConclusionsPCS symptoms were reported to a greater degree in persons with mild TBI at 3 months post-injury. One year after injury, no differences were found between TBI groups on the presence of PCS.

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