Skip to main content

Table 1 Univariate analysis of characteristics and parameter of cases and controls

From: Prolonged outbreak of clonal MDR Pseudomonas aeruginosa on an intensive care unit: contaminated sinks and contamination of ultra-filtrate bags as possible route of transmission?

Parameter Cases (n = 21) Controls (n = 21) p-value
P. aeruginosa infection; % (n) 42.9 (9) 52.4 (11) 0.758
MDR P. aeruginosa colonization; % (n) 100% (21) 42.9 (9) <0.001
SAPS II total (95%Confidence Interval [CI]) 50 (37–59) 44 (31–50) 0.147
Colonization site; % (n)
Tracheobronchial secretion 42.9 (9) 57.1 (12)  
Intraabdominal swab 9.5(2) 9.5 (2)  
Rectal 28.6 (6) -  
Wound swab 9.5 (2) -  
Urine 38.1 (8) 28.6 (6)  
Blood - 4.8 (1)  
Stay in a room with colonized sink; % (n) 66.7 (14) 28.6 (6) 0.062a
Contact with MDR colonized patient; % (n) 14.3 (3) -  
All drainages; % (n) 42.9 (9) 61.9 (13) 0.751
Dialysis or hemofiltration 33.3 (7) 4.8 (1) 0.045a
Gastric tube 95.2 (20) 85.7 (18) 0.606
Urinary catheter 100.0 (21) 100.0 (21) 1.000
Tracheal cannula 38.1 (8) 33.3 (7) 1.000
Central venous catheter 90.5 (19) 85.7 (18) 1.000
Leukopenia 14.3 (3) 14.3 (3) 1.000
Immunosuppression 38.1 (8) 9.5 (2) 0.067a
Septic chock 19.0 (4) 28.6 (6) 0.719
Surgery patient 85.7 (18) 90.5 (19) 1.000
Neurosurgery patient 14.3 (3) 23.8 (5) 0.697
Age (years) 71.0 (55.2–78.1) 75.5 (63.4–83.4) 0.120
LOS before colonization (days) 16 (11–34) 10 (5–28) 0.190
Length of stay overall (days) 38 (23–54) 30 (10–46) 0.170
Stay in single room (days) 0 (0–5) 0 (0–9) 1.000
Stay in shared room (days) 12 (6–30) 4 (0–16) 0.031a
Penicillin; % (n) 42.9 (9) 23.8 (5) 0.362
Cephalosporin; % (n) 42.9 (9) 23.8 (5) 0.362
Carbapenem; % (n) 42.9 (9) 28.6 (6) 0.520
Quinolone; % (n) 52.4 (11) 23.8 (5) 0.111
Aminoglycoside; % (n) 28.6 (6) 4.8 (1) 0.093a
Glycopeptide; % (n) 28.6 (6) 19.0 (4) 0.719
Antibiotic inhalation; % (n) 33.3 (7) 9.5 (2) 0.130
  1. Continuous data is displayed as median (interquartile range) and categorial data as percentage (number)
  2. SAPS Simplified Acute Physiology Score (score for the severity of disease), LOS length of stay
  3. aparameter was included in the multivariable regression analysis