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Table 1 Characteristics and outcomes of Escherichia coli bloodstream infections, Auckland District Health Board, 2005 - 2011

From: Population-based incidence and comparative demographics of community-associated and healthcare-associated Escherichia coli bloodstream infection in Auckland, New Zealand, 2005 – 2011

Characteristic All patients (n = 1507) Community-associated (n = 510) Healthcare-associated, community-onset (n = 608) Healthcare-associated, hospital-onset (n = 389) P value of CA vs. HCA-CO P value of CA vs. HCA-HO P value of HCA-CO vs. HCA-HO
Age, median, years (IQR) a 63 (45 – 77) 63 (47 – 74) 65 (47–79) 58 (35–75) 0.05 0.01 < 0.001
Gender, male b 678 (45) 208 (41) 255 (42) 215 (55) 0.71 < 0.001 < 0.001
Clinical outcomes        
LOS, median, days (IQR) a 7 (4–16) 5 (3 – 8) 6 (4 – 10) 24 (14 – 40) < 0.001 < 0.001 <0.001
ICU admission b 216 (14) 56 (11) 50 (8) 110 (28) 0.31 < 0.001 < 0.001
In-hospital mortality b 135 (9) 21 (4) 57 (9) 57 (15) < 0.001 < 0.001 0.01
Isolate characteristics        
ESBL phenotype b, c 66 (4.4) 24 (5) 30 (5) 32 (8.5) 0.89 0.04 0.04
MDR phenotype b 609 (40) 180 (35) 268 (44) 161 (41) 0.003 0.07 0.43
  1. a P value calculated using Mann Whitney U test.
  2. b P value calculated using χ2 test.
  3. c Number of isolates tested for ESBL phenotype = 1492 (505 CA, 602 HCA-CO, 385 HCA-HO).
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