Tabel 4. Patient characteristics of the 1047 inpatients included in the prevalence survey.

Parameter	All patients (N=1047)	Patients without NI (n=930)	Patients with NI (n=117)	p value
Age >59 years (median)	518 (50%)	461 (50%)	57 (49%)	0.922
Men	564 (54%)	491 (53%)	73 (62%)	0.061
Type of underlying disease
Cardiological	420 (40%)	363 (39%)	57 (49%)	0.046
Endocrinological	225 (22%)	194 (21%)	31 (27%)	0.188
Malignant neoplasm	213 (20%)	187 (20%)	26 (22%)	0.626
Gastrointestinal	200 (19%)	159 (17%)	41 (35%)	<0.001
Nephrological	176 (17%)	154 (17%)	22 (19%)	0.514
Neurological	140 (13%)	126 (14%)	14 (12%)	0.773
Trauma surgery	136 (13%)	117 (13%)	19 (16%)	0.306
Pulmonological	132 (13%)	107 (12%)	25 (21%)	0.005
Metabolic	103 (10%)	86 (9%)	17 (15%)	0.097
Angiological	100 (10%)	86 (9%)	14 (12%)	0.32
Hematological	55 (5%)	45 (5%)	10 (9%)	0.119
Rheumatological	42 (4%)	40 (4%)	2 (2%)	0.218
>2diseases	359 (34%)	301 (32%)	58 (50%)	<0.001
Other patient characteristics
Devices	709 (68%)	605 (65%)	104 (89%)	<0.001
Central venous catheter	211 (20%)	159 (17%)	52 (44%)	<0.001
Urinary catheter	207 (20%)	160 (17%)	47 (40%)	<0.001
Wound drains	154 (15%)	114 (12%)	40 (34%)	<0.001
Gastric tube	78 (7%)	51 (6%)	27 (23%)	<0.001
Endotracheal tube	42 (4%)	23 (3%)	19 (16%)	<0.001
Other vascular catheter	553 (53%)	478 (51%)	75 (64%)	0.01
>2devices	162 (16%)	115 (12%)	47 (40%)	<0.001
Antibiotic treatment in previous 6 months*1	672 (64%)	567 (61%)	105 (90%)	<0.001
Current antibiotic treatment	532 (51%)	440 (47%)	92 (79%)	<0.001
Surgery in previous 6 months	593 (57%)	502 (54%)	91 (78%)	<0.001
Hospital admission in previous 12 months	563 (54%)	481 (52%)	82 (70%)	<0.001
Presence of wounds	251 (24%)	204 (22%)	47 (40%)	<0.001
Dialysis	57 (5%)	49 (5%)	8 (7%)	0.514

^*1Not including antibiotics for treatment of NI; p value, level of significance; NI, nosocomial infection