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Laboratory investigation at onset and during follow-up.
| Age (months) | 12 | 13 | 15 | 18 | 24 |
|---|---|---|---|---|---|
| (DDAVP) | |||||
| Plasma | |||||
| Na (mEq/L) | 175 | 150 | 140 | 142 | 138 |
| K (mEq/L) | 4 | 3.9 | 3.8 | 3.3 | 3.3 |
| HCO3 | 24 | 25 | 26 | 27 | 27 |
| BE | −1 | −1 | 0 | −1 | 2 |
| Urine | |||||
| Caur/Creatur | 0.8 | 0.6 | 0.4 | 0.7 | 0.5 |
| Osmur (mOsmol/kg) | 140 (pre) 150 (post) |
