“…This finding is in contrast to the existing literature supporting a direct association between TBI and current suicidal ideation. Possible reasons for this discrepancy could be the way in which TBI, sleep, and suicidal ideation were measured across studies, as there can be variation in the operationalization and assessment of TBI (e.g., McCrea et al, 2008; Tate et al, 2013), sleep (e.g., Rosipal et al, 2013; Troxel et al, 2010), and suicidal ideation (e.g., Batterham et al, 2015). For example, the current study only assessed deployment-related TBI and not lifetime TBI.…”