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Associations Between Traumatic Brain Injury History and Future Headache Severity in Veterans: A Longitudinal Study.
Suri P, Stolzmann K, Iverson KM, Williams R, Meterko M, Yan K, Gormley K, Pogoda TK. Associations Between Traumatic Brain Injury History and Future Headache Severity in Veterans: A Longitudinal Study. Archives of physical medicine and rehabilitation. 2017 Nov 1; 98(11):2118-2125.e1.
To determine whether traumatic brain injury (TBI) history is associated with worse headache severity outcomes.
Prospective cohort study.
Department of Veterans Affairs (VA) outpatient clinics.
Veterans (N = 2566) who completed a mail follow-up survey an average of 3 years after a comprehensive TBI evaluation (CTBIE).
MAIN OUTCOME MEASURES:
The presence or absence of TBI, and TBI severity were evaluated by a trained clinician and classified according to VA/Department of Defense clinical practice guidelines. Headache severity was evaluated at both the baseline CTBIE assessment and 3-year follow-up using a 5-level headache score ranging from 0 ("none") to 4 ("very severe") based on headache-associated activity interference in the past 30 days. We examined associations of mild and moderate/severe TBI history, as compared to no TBI history, with headache severity in cross-sectional and longitudinal analyses, with and without adjustment for potential confounders.
Mean headache severity scores were 2.4 at baseline and 2.3 at 3-year follow-up. Mild TBI was associated with greater headache severity in multivariate-adjusted cross-sectional analyses (ß [SE] = .61 [.07], P < .001), as compared with no TBI, but not in longitudinal analyses (ß [SE] = .09 [.07], P = .20). Moderate/severe TBI was significantly associated with greater headache severity in both cross-sectional (ß [SE] = .66 [.09], P < .001) and longitudinal analyses (ß [SE] = .18 [.09], P = .04).
Headache outcomes are poor in veterans who receive VA TBI evaluations, irrespective of past TBI exposure, but significantly worse in those with a history of moderate/severe TBI. No association was found between mild TBI and future headache severity in veterans. Veterans with headache presenting for TBI evaluations, and particularly those with moderate/severe TBI, may benefit from further evaluation and treatment of headache.