Table 2 Sodium values and urea use

Plasma Na at admission (mEq/L)

139 ± 3

Plasma Na at diagnosis of hyponatremia (mEq/L)

131 ± 2

Days from admission to diagnosis of hyponatremia

4 (2–5)

Plasma Na before urea (mEq/L)

127 ± 2

Days from admission to start of urea treatment

7 (5–10)

Duration of urea treatment (days)

5 (3–7)

Daily urea dose (g/day)

50 (40–60)

Change in plasma Na over first 24 h (mEq/L)

3 (1–6)

Time to plasma Na > 130 mEq/L (days) (n = 25)

1 (1–2)

Time to plasma Na > 135 mEq/L (days) (n = 42)

3 (2–4)