Table 2.

Laboratory parameters.

All patients (SAH and ICH)	No infection (0)	Infection, noVRI (1)	VRI (2)	p-value	p -value of subgroup-comparison
	n = 85	n = 97	n = 81	KW-test	0 vs. 1	0 vs. 2	1 vs. 2
Plasma CRP	116 ± 92.1	176 ± 106.1	134 ± 96.5	<0.001	<0.001	0.525	0.013
Plasma PCT	1.3 ± 3.32	5.7 ± 23.52	2.6 ± 12.03	0.002	0.076	0.667	0.002
Plasma WBC	15 ± 4.8	24 ± 45.8	16 ± 5.1	0.001	<0.001	0.537	0.059
CSF WBC	362 ± 1205.4	514 ± 1562.3	2041 ± 10250.8	<0.001	0.418	<0.001	<0.001
SAH	No infection (0)	Infection, noVRI (1)	VRI (2)	p-value	p -value of subgroup-comparison
	n = 52	n = 67	n = 68	KW-test	0 vs. 1	0 vs. 2	1 vs. 2
Plasma CRP	116 ± 90.1	171 ± 104.2	140 ± 99.9	0.005	0.004	0.524	0.137
Plasma PCT	1.1 ± 2.23	2.0 ± 4.63	3.0 ± 13.09	0.035	0.600	0.770	0.029
Plasma WBC	16 ± 5.2	20.9 ± 34.7	16 ± 5.4	0.180
CSF WBC	336 ± 700.8	685 ± 1855.9	2174 ± 11096.5	<0.001	1.000	<0.001	<0.001
ICH	No infection (0)	Infection, noVRI (1)	VRI (2)	p-value	p -value of subgroup-comparison
	n = 33	n = 30	n = 13	KW-test	0 vs. 1	0 vs. 2	1 vs. 2
Plasma CRP	115 ± 96.7	189 ± 111.0	107 ± 73.6	0.008	0.013	1.000	0.077
Plasma PCT	1.7 ± 4.57	13.9 ± 41.01	1.0 ± 2.07	0.037	0.107	1.000	0.084
Plasma WBC	13 ± 3.7	30 ± 63.8	13 ± 2.2	0.001	0.001	1.000	0.012
CSF WBC	403 ± 1740.3	134 ± 155.8	1348 ± 3522.6	0.006	0.416	0.004	0.135
SAH vs. ICH	No infection	Infection, no VRI	VRI
MWU-test	p-value	p-value	p-value
Plasma CRP	0.735	0.492	0.368
Plasma PCT	0.749	0.200	0.657
Plasma WBC	0.031	0.410	0.016
CSF WBC	0.001	0.010	0.052

Statistics are performed using either a Kruskall Wallis test or a Mann-Whitney- U test, subgroup p-values are shown adjusted for multiple comparison using Bonferroni correction. CRP is described in mg/l, PCT in μg/l, WBC in G/l, and CSF WBC in n/μl. VRI, ventriculostomy related infection; SAH, subarachnoid hemorrhage; ICH, intracerebral hemorrhage; CRP, C-reactive protein; PCT, procalcitonin; WBC, white blood cell count; CSF, cerebrospinal fluid; KW-test, Kruskal Wallis test; MWU-test, Mann-Whitney-U test.