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

Table 3 Adjusted model of risk factors for MDR E coli infection, antibiotics as yes/no variable

	OR	95 % CI
Full model (N = 192)
Prescription of resistant^a antibiotics in hospital	4.4	1.8–11.2
Level of care
Independent	1.0
Assisted living	2.3	1.1–4.9
High dependency	10.2	2.5–42.5
Hospital admission	1.0	0.4–2.5
Recurrent UTI	2.2	1.0–4.9
Diabetes	2.4	1.0–5.7
Female gender	2.7	1.2–6.2
Age
65–74	1.0
75–84	1.5	0.6–4.1
85+	2.1	0.7–6.1
Excluding diabetes and recurrent UTI (N = 226)
Prescription of resistant^a antibiotics in hospital	5.6	2.5–12.9
Level of care
Independent	1.0
Assisted living	2.3	1.1–4.9
High dependency	7.5	2.2–25.7
Hospital admission	1.1	0.5–2.5
Female gender	3.2	1.5–6.9
Age
65–74	1.0
75–84	1.4	0.6–3.6
85+	2.3	0.9–6.1

^a ‘Resistant’ = antimicrobials to which the MDR E coli was resistant, i.e. gentamicin, quinolones, trimethoprim, trimethoprim-sulfamethoxazole, and amoxicillin

ISSN: 1471-2334