Severity of Traumatic Brain Injury in Older Adults and Risk of Ischemic Stroke and Depression.
Aparna Vadlamani, Jennifer S Albrecht
PMID 32108711WHAT IT FOUND
In older adults with traumatic brain injury, high injury severity was associated with a much higher risk of ischemic stroke but not depression.
Stroke risk was 6.68 times higher in the severe group. This suggests monitoring for stroke, not mood, based on injury severity.
Key findings
01High traumatic brain injury severity was associated with a significantly increased risk of ischemic stroke compared to low severity.
02High traumatic brain injury severity was not significantly associated with an increased risk of depression compared to low severity.
03The absolute risk of ischemic stroke was substantially higher in the high severity group (25.1 per 100 person-years) than in the low severity group (3.2 per 100 person-years).
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPs
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What it does not show
The study used a small sample (259 patients) from a single urban trauma center, which may limit generalizability. Patients with Medicare Advantage, commercial insurance, or no insurance were excluded, potentially biasing the sample toward those with specific healthcare access patterns. Pre-existing depression might have been underdiagnosed in the six months prior to injury, though the authors argue this would likely be balanced between severity groups. The study relied on administrative claims data for outcome identification, which may lack clinical nuance compared to direct patient assessment.
Declared interests
The study was supported by the National Institute on Aging (grant number 1R03AG054069-01) and the National Heart, Lung, and Blood Institute (grant number 1R03HL142136-01).
The easy way to misread this
Do not assume that high-severity TBI increases the risk of depression in older adults. While stroke risk was significantly elevated, the association with depression did not reach statistical significance after adjustment.