To the Editor A recent propensity-matched cohort study of more than 350 000 veterans with and without traumatic brain injury (TBI) by Barnes et al1 found that mild TBI was associated with more than a 2-fold increase in the risk of dementia, yielding implications for long-term neurodegenerative consequences following TBI. This longitudinal study allowed for the power to detect associations and to adjust for a range of potential confounders, including other medical and psychiatric comorbidities. While we applaud the authors and feel the findings are important, we note a discrepancy in their report of comorbidities, specifically “sleep disorders” (ie, sleep apnea, insomnia, hypersomnia, parasomnia, and circadian rhythm disorders).
Lim MM, Mysliwiec V. Overlooked Implications of Disturbed Sleep in Traumatic Brain Injury. JAMA Neurol. Published online December 03, 2018. doi:10.1001/jamaneurol.2018.3738
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