Table 1. Baseline characteristics of patients on hospital admission (n = 2390).

Medians with IQRs.

Parameter	Median (IQR)
Length of hospital stay (days)	3 (0;9)
Age (years)	57 (40;71)
eGFR (MDRD) (ml/min/1,73m2)	89.4 (57.4;114.4)
Sodium (mmol/l)	139 (136;141)
Chloride (mmol/l)	103 (99;106)
Phosphate (mmol/l)	1.9 (0.8;1.2)
Calcium (mmol/l)	2.25 (2.15;2.34)
Potassium (mmol/l)	3.9 (3.7;4.3)
Magnesium (mmol/l)	0.8 (0.72;0.88)
Osmolality (mosm/kg)	291 (283;306)