Table 3. Data is presented as mean values with IQRs.

	Hypophosphatemia	Normophosphatemia	Hyperphosphatemia
Length of hospital stay (days)	3 (0;8)	3 (0;3)	6 (1;14)*
eGFR(MDRD) (ml/min/1,73m2)	90.7 (65.5;114.3)	92.8 (64.0;92.7)	22.4 (11.7;64.6)*
Sodium (mmol/l)	139 (135;141)	139 (136;139)	137 (133;140)*
Chloride (mmol/l)	104 (100:106)	103 (100;103)	101 (96;106)*
Phosphate (mmol/l)	0.68 (0.57;0.75)*	1.04 (0.93;1.04)	1.83 (1.63;2.23)*
Calcium (mmol/l)	2.24 (2.13;2.34)	2.26 (2.17;2.26)	2.17 (2.05;2.23)*
Potassium (mmol/l)	3.8 (3.5;4.1)*	4.0 (3.7;4.0)	4.4 (3.9;5.2)*
Magnesium (mmol/l)	0.77 (0.68;0.83)*	0.81 (0.73;0.81)	0.93 (0.81;1.04)*
Osmolality (mosm/kg)	288 (282;293)*	291 (283;291)	311 (295;328)*

Statistical testing shows group comparison of patients with hypophosphatemia (n = 480) and hyperphosphatemia (n = 215) versus patients with serum phosphate within the normal range (n = 1695) (Mann-Whitney U, p<0.05*).