Cerebrospinal fluid cell count variability is a major confounding factor in external ventricular drain-associated infection surveillance diagnostics: a prospective observational study

Table 1 Patient characteristics

Characteristics
Patients	51
Male sex	20 (39)
Age	61 (49, 70)
Length of stay, days	14 (10, 18.5)
Paired samples	162
R-samples	119 (73.5)
C-samples	43 (26.5)
Patients allocated to R-samples	44 (86)
Changed EVDI status	13 (29.5)
Patients allocated to C-samples	30 (59)
Changed EVDI status	0 (0)
CT-derived variables
IVH volume, mm³	1210 (223, 6526)
Sediment depth, mm	16 (9.75, 27)
Catheter distance, mm	17.5 (2.5, 48)
IVHS, score 1–23	10 (8, 11)
Admission diagnoses
SAH	41
ICH	7
Trauma	3

Data are presented in no (%), or median (IQR). Percentage allocated to R-samples or C-samples represent percentage of whole patient cohort. IVH volume, Sediment Depth, Catheter Distance, and IVHS are defined as in methods. EVDI: external ventricular drain infection. R-samples: paired samples around a patient repositioning. C-samples: paired non-repositioned samples. IVH: intraventricular hemorrhage. IVHS: intraventricular hemorrhage score. SAH: subarachnoid hemorrhage. ICH: intracerebral hemorrhage

ISSN: 1364-8535