Prevalence and types of sleep disturbances acutely after traumatic brain injury.

To assess the prevalence of and risk factors for sleep disturbances in the acute post-traumatic brain injury (TBI) period.Longitudinal, observational study.Fifty-four first time closed-head injury patients were recruited and evaluated within 3 months after injury. Pre-injury and post-injury sleep disturbances were compared on the Medical Outcome Scale for Sleep. The subjects were also assessed on anxiety, depression, medical comorbidity and severity of TBI.Subjects were worse on most sleep measures after TBI compared to before TBI. Anxiety disorder secondary to TBI was the most consistent significant risk factor to be associated with worsening sleep status.Anxiety is associated with sleep disturbances after TBI. Further studies need to be done to evaluate if this is a causal relationship.