Introduction To investigate the nature and severity of complaints two weeks post trauma in a cohort of mild to moderate Traumatic Brain Injury (TBI) patients, and to determine the relation with return to work (RTW). Furthermore, it was explored whether an active versus a passive coping style is related to the severity of perceived complaints and the rate of RTW. Methods Multicenter prospective longitudinal cohort study of mild to moderate TBI patients admitted to the Emergency Departments. Brain injury severity was determined using the Glasgow Coma Scale (GCS) on admission. Patients received a questionnaire 2 weeks post trauma covering complaints (Dutch modified Rivermead Postconcussion Questionnaire), return to work and coping styles (Utre...