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Hyponatremia severity by clinical syndrome.
| Serum Sodium | Meningitis n (%) |
Encephalitis n (%) |
|---|---|---|
| Normal (≥135 mmol/L) | 95 (69) | 17 (37) |
| Mild (130 to 134 mmol/L) | 37 (27) | 16 (35) |
| Moderate or severe (≤129 mmol/L) | 6 (4) | 13 (28) |
| Total | 138 (100) | 46 (100) |
