LATE-ONSET POST-CONCUSSION SYMPTOMS AFTER MILD BRAIN INJURY - THE ROLE OF PREMORBID, INJURY-RELATED, ENVIRONMENTAL, AND PERSONALITY FACTORS

The present study investigated the possible role of a number of pre- p eri-, 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 e nvironmental factors. Subjects were 55 persons with mild brain injury. PCS was defined in terms of the severity and impact of 'late-onset' s ymptoms. Pre- and peri-traumatic factors were not associated with leve l of PCS symptom impact. Among post-traumatic factors, only level of p sychological distress was strongly associated with impact level. The r esults suggest the importance of psychological factors in prolonged PC S.