Table 2 Investigations performed on patients.
| Investigation | n (%) |
|---|---|
| Serum sodium | 104 (100) |
| Serum creatinine | 102 (96) |
| Urine osmolality | 29 (27) |
| Serum osmolality | 28 (26) |
| Urine sodium | 11(10) |
| Plasma cortisol | 8 (8) |
| Short Synacthen test | 2 (2) |
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