Subgroup characteristics defined by their working memory test z scores (DSB <1 or ≥1) and time since injury (<2 weeks or 2–4 weeks)a
| DSB <1 | DSB ≥1 | |||||
|---|---|---|---|---|---|---|
| MTBI (<2 Weeks) | MTBI (2–4 Weeks) | HC | MTBI (<2 Weeks) | MTBI (2–4 Weeks) | HC | |
| No. | 4 | 7 | 12 | 4 | 4 | 8 |
| Age | 30 ± 6 | 29 ± 8 | 31 ± 7 | 37 ± 8 | 26 ± 4 | 37 ± 14 |
| DSB | −0.67 ± 0.27 | −0.24 ± 0.25 | 0.08 ± 0.38 | 1.42 ± 0.5 | 1.58 ± 0.32 | 1.79 ± 0.71 |
↵a Data are means unless otherwise indicated.