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Table 4 Adjusted model of risk factors for MDR E coli infection, antibiotics as number of courses

From: An outbreak of multi-drug resistant Escherichia coli urinary tract infection in an elderly population: a case-control study of risk factors

  OR 95 % CI
Full model (N = 192)   
Courses of resistanta antibiotics in hospital   
None 1.0  
1 2.9 1.0–8.3
2 2.6 0.7–9.7
3+ 6.5 1.4–30.5
Level of care   
Independent 1.0  
Assisted living 2.6 1.1–6.2
High dependency 9.4 2.3–38.7
Hospital admission 1.2 0.5–2.9
Recurrent UTI 2.1 0.9–4.7
Diabetes 2.6 1.1–6.1
Female gender 2.6 1.1–6.0
Age   
65–74 1.0  
75–84 1.5 0.5–3.9
85+ 2.1 0.7–6.1
Excluding diabetes and recurrent UTI (N = 226)   
Courses of resistanta antibiotics in hospital   
None 1.0  
1 4.0 1.5–10.5
2 4.4 1.3–15.6
3+ 6.5 1.6–25.9
Level of care   
Independent 1.0  
Assisted living 2.1 1.0–4.4
High dependency 6.9 2.0–23.2
Hospital admission 1.3 0.6–2.8
Female gender 3.2 1.5–6.8
Age   
65–74 1.0  
75–84 1.4 0.6–3.5
85+ 2.4 0.9–6.3
  1. a ‘Resistant’ = antimicrobials to which the MDR E coli was resistant, i.e. gentamicin, quinolones, trimethoprim, trimethoprim-sulfamethoxazole, and amoxicillin