King NS, Kirwilliam S.
Brain Inj. 2011 Mar 14.
Objective: A small minority of individuals experience long-term or permanent post-concussion symptoms (PCS) after a mild head injury (MHI). There has been no systematic, quantitative research examining a wide range of variables in a representative sample of such patients (i.e. with PCS for more than 18 months). This study explores a broad spectrum of demographic, cognitive, emotional and psychosocial factors (known to be important in the development of early PCS) in a representative sample of patients with permanent PCS.
Conclusions: Very high levels of PCS, high post-injury unemployment and measurable cognitive deficits can be permanent features of MHI. Quality-of-life is directly related to symptom severity. Age, pre-/post-morbid concomitant factors, neuropsychological deficits and emotional status are key variables in understanding the phenomenon of permanent PCS. Important vulnerability factors in the development of such may therefore be older age and any additional compromise to an individual's emotional or cognitive capacities.
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