Table 1. Laboratory and clinical baseline characteristics.

4176 medical patients were split in three cohorts according to their BUN concentration at admission, comparison of means by ANOVA.

	BUN 0–20 mg/dL		BUN 20–40 mg/dL		BUN >40mg/dL		overall cohort
	n = 1820		n = 1296		n = 1060		n = 4176
	mean	SEM	mean	SEM	mean	SEM	mean	SEM	p-value
age	62.2	13.8	70.1	11.7	69.9	12.2	66.6	13.4	<0.001
SAPS2 (pts)	31.7	16.0	44.3	19.3	51.8	18.8	42.2	19.9	<0.001
APACHE2 (pts)	16.2	8.6	22.2	8.9	26.6	8.5	21.5	9.6	<0.001
lactate (mmol/L)	2.0	3.4	2.8	3.1	3.3	4.0	2.6	3.5	<0.001
PCT (mmol/L)	5.6	15.6	13.4	38.5	14.5	33.8	12.0	32.5	0.001
glucose (mmol/L)	9.0	3.4	10.6	4.1	10.9	3.9	10.0	3.9	<0.001
haemoglobine (mmol/L)	8.2	3.6	7.6	1.1	7.3	4.6	7.8	3.4	<0.001
ASAT (μmol/l*s)	3.0	6.6	5.0	18.1	7.2	24.9	4.9	17.5	<0.001
ALAT (μmol/l*s)	1.2	3.9	2.4	7.4	3.6	10.6	2.3	7.6	<0.001
max_Gamma_GT_μmol	1.4	2.5	1.7	2.2	2.1	2.3	1.7	2.4	<0.001
max_Bilirubin_ges_μmol	16.7	19.4	19.3	26.7	31.2	56.6	21.3	35.5	<0.001
leucocytes (G/L)	10.8	5.1	12.5	9.0	14.2	15.8	12.2	10.1	<0.001
BUN (mg/dL)	13.8	3.7	27.9	5.6	72.6	32.4	33.1	29.1	<0.001
creatinine (mg/dL)	84.0	26.6	135.9	81.0	307.4	215.7	156.8	149.5	<0.001
sodium (mmol/L)	139.5	4.3	140.7	5.1	140.6	7.1	140.1	5.4	<0.001
potassium (mmol/L)	4.0	0.4	4.1	0.6	4.3	0.7	4.1	0.6	<0.001