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Journal Article
Research Support, N.I.H., Extramural
The clinical impact of fluoroquinolone resistance in patients with E coli bacteremia.
Journal of Hospital Medicine : An Official Publication of the Society of Hospital Medicine 2011 July
BACKGROUND: There are limited data on fluoroquinolone resistance and its impact on mortality in cases of Escherichia coli bloodstream infection (BSI).
OBJECTIVE: To determine risk factors for in-hospital mortality among patients with E coli BSIs.
DESIGN: A retrospective case-control study.
SETTING: A 1250-bed tertiary academic medical center.
PATIENTS: Patients with fluoroquinolone-resistant E coli BSI from January 1, 2000 through December 31, 2005 with 1:1 matched control patients with fluoroquinolone-sensitive E coli BSI. INDEPENDENT OUTCOME: In-hospital mortality.
RESULTS: A total of 93 cases and 93 control patients were included. Compared with control patients, cases were more likely to be admitted from a long-term care facility (35% vs. 9%; P < .001) and to have a hospital-acquired bacteremia (54% vs. 33%; P = .008). Crude mortality was 26% for cases and 8% for controls (P = .002). On univariate analysis, predictors for in-hospital mortality included female gender, admission from a long-term care facility, APACHE II score >10, Charlson comorbidity score >4, cardiac dysfunction, cirrhosis, renal dysfunction, treatment with corticosteroids, and a fluoroquinolone-resistant E coli bacteremia. On multivariate analysis, independent risk factors for in-hospital mortality were cirrhosis (adjusted odds ratio [aOR], 7.2; confidence interval [CI], 1.7-29.8; P = .007), cardiac dysfunction (aOR, 3.9; CI, 1.6-9.4; P = .003), and infection with a fluoroquinolone-resistant E coli isolate (aOR, 3.9; CI, 1.5-10.2; P = .005).
CONCLUSIONS: After controlling for severity of illness and multiple comorbidities only fluoroquinolone resistance, cirrhosis, and cardiac dysfunction independently predicted mortality in patients with E coli bacteremia.
OBJECTIVE: To determine risk factors for in-hospital mortality among patients with E coli BSIs.
DESIGN: A retrospective case-control study.
SETTING: A 1250-bed tertiary academic medical center.
PATIENTS: Patients with fluoroquinolone-resistant E coli BSI from January 1, 2000 through December 31, 2005 with 1:1 matched control patients with fluoroquinolone-sensitive E coli BSI. INDEPENDENT OUTCOME: In-hospital mortality.
RESULTS: A total of 93 cases and 93 control patients were included. Compared with control patients, cases were more likely to be admitted from a long-term care facility (35% vs. 9%; P < .001) and to have a hospital-acquired bacteremia (54% vs. 33%; P = .008). Crude mortality was 26% for cases and 8% for controls (P = .002). On univariate analysis, predictors for in-hospital mortality included female gender, admission from a long-term care facility, APACHE II score >10, Charlson comorbidity score >4, cardiac dysfunction, cirrhosis, renal dysfunction, treatment with corticosteroids, and a fluoroquinolone-resistant E coli bacteremia. On multivariate analysis, independent risk factors for in-hospital mortality were cirrhosis (adjusted odds ratio [aOR], 7.2; confidence interval [CI], 1.7-29.8; P = .007), cardiac dysfunction (aOR, 3.9; CI, 1.6-9.4; P = .003), and infection with a fluoroquinolone-resistant E coli isolate (aOR, 3.9; CI, 1.5-10.2; P = .005).
CONCLUSIONS: After controlling for severity of illness and multiple comorbidities only fluoroquinolone resistance, cirrhosis, and cardiac dysfunction independently predicted mortality in patients with E coli bacteremia.
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