TABLE 1.
Demographics and TBI history of participants
| Age (mean ± SEM) | Sex (female/male) | Total TBIs-subjects | ||
|---|---|---|---|---|
| A. sTBIa | Interval between last TBI and blood donation (mean ± SEM) | |||
| Control (n = 12) | 21.6 ± 0.68 | 6/6 | None | – |
| Acute TBI (n = 12) | 21.3 ± 0.40 | 6/6 | 1–5 | ≤1 week |
| 2–1 | ||||
| Chronic TBI (n = 12) | 20.1 ± 0.48 | 6/6 | 2–6 | 6.58 ± 0.89 months |
| 3–3 | ||||
| 4–3 | ||||
| B. mtTBIb | Months between last TBI and blood donation (mean ± SEM) | |||
| Chronic control | ||||
| Early (n = 5) | 38.0 ± 3.89 | 1/4 | None | – |
| Late (n = 5) | 74.6 ± 1.81 | 2/3 | None | – |
| Chronic TBI | ||||
| Early (n = 10) | 38.4 ± 2.44 | 3/7 | 1–7 | 28.2 ± 4.74 |
| 2–3 | ||||
| Late (n = 15) | 77.0 ± 1.86 | 2/13 | 1–4 | 561 ± 58.4 |
| 2–5 | ||||
| 3–3 | ||||
| 4–3 |
Abbreviations: mtTBI, military-inflicted TBI; sTBI, sports-related TBI.
a
Acute sTBI participants had no previous episodes of TBI (6/12) or up to two previous episodes at least 12 months before the study episode, whereas chronic sTBI participants had at least two previous episodes with the most recent being no more than 12 months before the study episode.
b
Early chronic mtTBI encompasses participants studied 1–4 years after TBI and late chronic mtTBI those studied ≥12 years after TBI.