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Table 1 Incidence and device–utilization ratio in device–associated infections from 2000 to 2008

From: Surveillance on secular trends of incidence and mortality for device–associated infection in the intensive care unit setting at a tertiary medical center in Taiwan, 2000–2008: A retrospective observational study

Device type 2000 2001 2002 2003 2004 2005 2006 2007 2008 Overall pvalue
Patient days 13,915 14,144 14,144 14,021 14,274 14,206 13,753 14,049 13,809 126,315  
Ventilator–associated pneumonia, n 21 47 32 44 41 29 23 30 25 292  
  Ventilator–days 11,211 8,941 9,101 9,246 9,420 11,121 10,778 11,545 10,548 91,911  
  Rate per 1000 ventilator–days 1.87 5.26 3.52 4.76 4.35 2.61 2.13 2.60 2.37 3.18 <0.001
  DU ratio 0.81 0.63 0.64 0.66 0.66 0.78 0.78 0.82 0.76 0.73 <0.001
Catheter–associated urinary tract infection, n 48 37 33 38 40 19 22 64 51 352  
  Urinary catheter–days 12,231 11,233 9,208 9,140 9,426 11,268 10,965 11,104 9,077 93,652  
  Rate per 1000 urinary catheter–days 3.92 3.29 3.58 4.16 4.24 1.69 2.01 5.76 5.62 3.76 <0.001
  DU ratio 0.88 0.79 0.65 0.65 0.66 0.79 0.80 0.79 0.66 0.74 0.166
Central line–associated bloodstream infection, n 28 26 16 18 16 15 25 22 23 189  
  Central line–days 12,773 7,480 7,531 7,819 7,546 12,494 11,502 11,833 10,526 89,504  
  Rate per 1000 central line–days 2.19 3.48 2.12 2.30 2.12 1.20 2.17 1.86 2.19 2.11 <0.001
  DU ratio 0.92 0.53 0.53 0.56 0.53 0.88 0.84 0.84 0.76 0.71 <0.001
  1. Device–utilization (DU) ratio=number of device–days / number of patient–days.