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Serum electrolyte concentrations by group.
| Laboratory | Normal Range | Group | 48 h | Week 1 |
|---|---|---|---|---|
| Na + (mmol/1) | 135–146 | Control | 139 ± 0.0 | 140 ± 1.0 |
| Concussion | 141 ± 0.8 | 140 ± 2 | ||
| K + (mmol/1) | 3.5–5.3 | Control | 4.5 ± 0.4 | 4.5 ± 0.3 |
| Concussion | 4.4 ± 0.3 | 4.2 ± 0.2 | ||
| CI− (mmol/1) | 98–110 | Control | 104 ± 1.3 | 104 ± 2.2 |
| Concussion | 104 ± 3.1 | 104 ± 3 | ||
| Osm (mOsm/kg) | 275–305 | Control | 286 ± 2 | 284 ± 4 |
| Concussion | 281 ± 4 | 281 ± 5 |
Data are presented as group mean ± SD. Sample size per group: control = 4; concussion = 5.
