| Serum sodium category |  | ||
---|---|---|---|---|
Measures | Acquire hyponatraemia (n = 917) | Always normal (n = 5068) | Acquire hypernatraemia (n = 2157) | p value‡ |
ICU length of stay, median (IQR), d†| 6 (3 to 12) | 2 (1 to 4) | 7 (4 to 13) | <0.001 |
Hospital length of stay, median (IQR), d†| 25 (14 to 50) | 12 (7 to 24) | 24 (14 to 51) | <0.001 |
ICU mortality, number (%) | 164 (18) | 456 (9) | 488 (23) | <0.001 |
Hospital mortality, number (%) | 255 (28) | 799 (16) | 723 (34) | <0.001 |