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  • Title: Late-onset post-concussion symptoms after mild brain injury: the role of premorbid, injury-related, environmental, and personality factors.
    Author: Karzmark P, Hall K, Englander J.
    Journal: Brain Inj; 1995 Jan; 9(1):21-6. PubMed ID: 7874092.
    Abstract:
    The present study investigated the possible role of a number of pre- peri-, and post-traumatic factors in the experience of post-concussion syndrome (PCS). These factors included: (1) history of premorbid risk factors, (2) severity of injury, and (3) post-morbid functioning and environmental factors. Subjects were 55 persons with mild brain injury. PCS was defined in terms of the severity and impact of 'late-onset' symptoms. Pre- and peri-traumatic factors were not associated with level of PCS symptom impact. Among post-traumatic factors, only level of psychological distress was strongly associated with impact level. The results suggest the importance of psychological factors in prolonged PCS.
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