• Arch Phys Med Rehabil · Feb 2016

    Review Meta Analysis

    Is Sex an Indicator of Prognosis After Mild Traumatic Brain Injury: A Systematic Analysis of the Findings of the World Health Organization Collaborating Centre Task Force on Mild Traumatic Brain Injury and the International Collaboration on Mild Traumatic Brain Injury Prognosis.

    • Carol Cancelliere, James Donovan, and J David Cassidy.
    • Division of Health Care and Outcomes Research, Toronto Western Research Institute, University Health Network, University of Toronto, Toronto, ON, Canada; Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada.
    • Arch Phys Med Rehabil. 2016 Feb 1; 97 (2 Suppl): S5-18.

    ObjectiveTo determine sex differences in the recovery and prognosis after mild traumatic brain injury (MTBI) in adults and children.Data SourcesWe analyzed all scientifically admissible primary studies in the World Health Organization (WHO) (n=120) and International Collaboration on Mild Traumatic Brain Injury Prognosis (ICoMP) (n=101) systematic reviews regarding prognosis of MTBI for sex-stratified findings. They searched MEDLINE and other databases from 1980 through 2000 (WHO) and 2001 through 2012 (ICoMP) for published, peer-reviewed reports in English and other languages.Study SelectionWe selected controlled trials and cohort and case-control studies that assessed the effect of sex on outcomes after MTBI.Data ExtractionData from the eligible studies from both systematic reviews combined (n=14, 7%) were extracted into evidence tables.Data SynthesisPrognostic information relating to sex was prioritized according to design as exploratory or confirmatory, and a best-evidence synthesis was conducted. After MTBI, females may have a higher risk of epilepsy (children, young adults) and suicide, and use more health care services; males may be at higher risk for schizophrenia. Most studies did not find a sex difference for postconcussion symptoms in children and adults. No sex difference was found for risk of dementia and primary brain tumor, return to work, or posttraumatic stress syndrome.ConclusionsSex is not a well-studied prognostic indicator for recovery after MTBI, but small sex differences were found for some outcomes. More well-designed studies are needed that report outcomes according to sex and control for potential confounders.Copyright © 2016 American Congress of Rehabilitation Medicine. Published by Elsevier Inc. All rights reserved.

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