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March 30, 2021; 96 (13) Article

Traumatic Brain Injury and Incidence Risk of Sleep Disorders in Nearly 200,000 US Veterans

Yue Leng, Amy L. Byers, Deborah E. Barnes, Carrie B. Peltz, Yixia Li, Kristine Yaffe
First published March 3, 2021, DOI: https://doi.org/10.1212/WNL.0000000000011656
Yue Leng
From the Department of Psychiatry (Y. Leng, A.L.B., D.E.B., K.Y.), Department of Epidemiology and Biostatistics (A.L.B., D.E.B., K.Y.), and Department of Neurology (K.Y.), University of California, San Francisco; and San Francisco Veterans Affairs Health Care System (A.L.B., D.E.B., C.B.P., Y. Li., K.Y.), CA.
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Amy L. Byers
From the Department of Psychiatry (Y. Leng, A.L.B., D.E.B., K.Y.), Department of Epidemiology and Biostatistics (A.L.B., D.E.B., K.Y.), and Department of Neurology (K.Y.), University of California, San Francisco; and San Francisco Veterans Affairs Health Care System (A.L.B., D.E.B., C.B.P., Y. Li., K.Y.), CA.
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Deborah E. Barnes
From the Department of Psychiatry (Y. Leng, A.L.B., D.E.B., K.Y.), Department of Epidemiology and Biostatistics (A.L.B., D.E.B., K.Y.), and Department of Neurology (K.Y.), University of California, San Francisco; and San Francisco Veterans Affairs Health Care System (A.L.B., D.E.B., C.B.P., Y. Li., K.Y.), CA.
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Carrie B. Peltz
From the Department of Psychiatry (Y. Leng, A.L.B., D.E.B., K.Y.), Department of Epidemiology and Biostatistics (A.L.B., D.E.B., K.Y.), and Department of Neurology (K.Y.), University of California, San Francisco; and San Francisco Veterans Affairs Health Care System (A.L.B., D.E.B., C.B.P., Y. Li., K.Y.), CA.
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Yixia Li
From the Department of Psychiatry (Y. Leng, A.L.B., D.E.B., K.Y.), Department of Epidemiology and Biostatistics (A.L.B., D.E.B., K.Y.), and Department of Neurology (K.Y.), University of California, San Francisco; and San Francisco Veterans Affairs Health Care System (A.L.B., D.E.B., C.B.P., Y. Li., K.Y.), CA.
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Kristine Yaffe
From the Department of Psychiatry (Y. Leng, A.L.B., D.E.B., K.Y.), Department of Epidemiology and Biostatistics (A.L.B., D.E.B., K.Y.), and Department of Neurology (K.Y.), University of California, San Francisco; and San Francisco Veterans Affairs Health Care System (A.L.B., D.E.B., C.B.P., Y. Li., K.Y.), CA.
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Traumatic Brain Injury and Incidence Risk of Sleep Disorders in Nearly 200,000 US Veterans
Yue Leng, Amy L. Byers, Deborah E. Barnes, Carrie B. Peltz, Yixia Li, Kristine Yaffe
Neurology Mar 2021, 96 (13) e1792-e1799; DOI: 10.1212/WNL.0000000000011656

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Abstract

Objective To test the hypothesis that veterans with traumatic brain injury (TBI) have an increased subsequent risk of sleep disorders, we studied the longitudinal association between TBI and incident sleep disorders in nearly 200,000 veterans.

Methods We performed a cohort study of all patients diagnosed with a TBI in the Veterans Health Administration system from October 1, 2001, to September 30, 2015, who were age-matched 1:1 to veterans without TBI. Veterans with prevalent sleep disorders at baseline were excluded. Development of sleep disorders was defined as any inpatient or outpatient diagnosis of sleep apnea, hypersomnia, insomnia, or sleep-related movement disorders based on ICD-9 codes after the first TBI diagnosis or the random selection date for those without TBI. We restricted the analysis to those with at least 1 year of follow-up. We used Cox proportional hazards models to examine the association between TBI and subsequent risk of sleep disorders.

Results The study included 98,709 veterans with TBI and 98,709 age-matched veterans without TBI (age 49 ± 20 years). After an average follow-up of 5 (1–14) years, 23,127 (19.6%) veterans developed sleep disorders. After adjustment for demographics, education, income, and medical and psychiatric conditions, those who had TBI compared to those without TBI were 41% more likely to develop any sleep disorders (hazard ratio 1.41 [95% confidence interval 1.37–1.44]), including sleep apnea (1.28 [1.24–1.32]), insomnia (1.50 [1.45–1.55]), hypersomnia (1.50 [1.39–1.61]), and sleep-related movement disorders (1.33 [1.16–1.52]). The association was stronger for mild TBIs, did not differ appreciably by presence of posttraumatic stress disorder, and remained after a 2-year time lag.

Conclusion In 197,418 veterans without sleep disorders, those with diagnosed TBI had an increased risk of incident sleep disorders over 14 years. Improved prevention and long-term management strategies for sleep are needed for veterans with TBI.

Glossary

CI=
confidence interval;
CTBIE=
Comprehensive Traumatic Brain Injury Evaluation;
HR=
hazard ratio;
ICD-9=
International Classification of Diseases, 9th revision;
mTBI=
mild TBI;
NPCD=
National Patient Care Databases;
PTSD=
posttraumatic stress disorder;
TBI=
traumatic brain injury;
VHA=
Veterans Health Administration

Footnotes

  • Go to Neurology.org/N for full disclosures. Funding information and disclosures deemed relevant by the authors, if any, are provided at the end of the article.

  • CME Course: NPub.org/cmelist

  • Received September 16, 2020.
  • Accepted in final form December 23, 2020.
  • © 2021 American Academy of Neurology
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