Over the last decade, much research has been devoted to concussion among military personnel. Post-concussion symptoms after blast-related concussion are common, but it is unknown whether symptom reporting differs over time. This study's objective was to assess the relationship between time since injury and post-concussion symptom reporting. We conducted a retrospective review of existing records to identify service members who experienced blast-related concussion during deployment between 2007 and 2012 and who responded to a Post-Deployment Health Assessment (PDHA). The study population included 3690 military personnel grouped by time between injury and PDHA completion: 1-90 days (45.3%, n = 1,673), 91-180 days (33.0%, n = 1,216), or 181-365 days (21.7%, n = 801). Post-concussion symptoms assessed on the PDHA included headache, tinnitus, memory problems, concentration problems, difficulty making decisions, irritability, dizziness, and sleep problems. All post-concussion symptoms were higher for 91-180 days and 181-365 days after injury relative to 1-90 days, with the exception of dizziness. After adjustment for loss of consciousness, mental health comorbidity, and other covariates, the odds of reporting three or more post-concussion symptoms were significantly higher in those who completed the PDHA 91-180 days (odds ratio: 1.29; 95% confidence interval: 1.09-1.51) or 181-365 days after injury (odds ratio: 1.33; 95% confidence interval: 1.09-1.61), compared with the 1-90 days group. These findings suggest that refinements to in-theater medical care may be needed to reduce post-concussion symptom burden and improve the prospect of concussion recovery.

中文翻译：

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受伤后的时间是爆炸相关脑震荡军人脑震荡后症状报告的一个因素


在过去的十年中，大量研究致力于军事人员的脑震荡。爆炸相关脑震荡后的脑震荡后症状很常见，但尚不清楚症状报告是否会随着时间的推移而有所不同。本研究的目的是评估受伤后的时间与脑震荡后症状报告之间的关系。我们对现有记录进行了回顾性审查，以确定在 2007 年至 2012 年部署期间经历过爆炸相关脑震荡的服役人员以及对部署后健康评估 (PDHA) 做出反应的服役人员。研究人群包括 3690 名军事人员，按受伤和 PDHA 完成之间的时间分组：1-90 天（45.3%， n = 1,673）、91-180 天（33.0%， n = 1,216）或 181-365 天（21.7%） ， n = 801）。 PDHA 评估的脑震荡后症状包括头痛、耳鸣、记忆问题、注意力不集中、决策困难、烦躁、头晕和睡眠问题。除头晕外，所有脑震荡后症状在受伤后 91-180 天和 181-365 天均高于 1-90 天。调整意识丧失、心理健康合并症和其他协变量后，在 91-180 天完成 PDHA 的人中，报告三种或更多脑震荡后症状的几率显着更高（比值比：1.29；95% 置信区间： 1.09-1.51）或受伤后181-365天（比值比：1.33；95%置信区间：1.09-1.61），与1-90天组相比。这些发现表明，可能需要改进战区内的医疗护理，以减轻脑震荡后症状负担并改善脑震荡康复的前景。