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Table 1 Demographic and clinical characteristics of the study population (n = 126)

From: Pseudomonas aeruginosa acquisition on an intensive care unit: relationship between antibiotic selective pressure and patients' environment

Characteristic  
Age (years) 57 ± 17
Male/female 72/54
SAPS II 45 ± 18
Hospitalization before admission 88 (70.0%)
Underlying conditions 0.7 ± 0.7
   immunosuppression 29 (23.0%)
   chronic respiratory failure 24 (19.0%)
   diabetes 22 (17.5%)
   heart disease 4 (3.2%)
   renal disease 4 (3.2%)
   cirrhosis 2 (1.6%)
Invasive device  
   Mechanical ventilation (%) 78
Duration (days) 6 (2 to 10)
   Central venous catheter (%) 65
Duration (days) 5 (0 to 10)
   Nasogastric tube (%) 72
Duration (days) 6 (0 to 10)
   Enteral nutrition (%) 93
Duration (days) 6 (4 to 9)
   Foley catheter (%) 79
Duration (days) 6 (2 to 11)
Length of stay (days) median 8 (6 to 12)
ICU mortality 29 (23%)
  1. Values are shown as mean ± SD, n (%), or median (1st to 3rd quartile).
  2. SAPS II: Simplified Acute Physiology Score; ICU: intensive care unit.