JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Risk factors for neurological complications in complete hemolytic uremic syndrome caused by Escherichia coli O157.

BACKGROUND: The aim of the present study was to investigate the predictive parameters for encephalopathy in complete hemolytic uremic syndrome (HUS) in a large outbreak of O157: H7 infection in 1996.

METHODS: A total of 182 inpatients, 71 of whom had complete HUS, including 12 patients with neurological complications, and 46 colitis patients were studied. Presenting signs and symptoms (n = 115) and laboratory data (n = 69) were analyzed using monovariate and multivariate analysis.

RESULTS: After adjusting for age and gender, logistic regression showed that presenting symptoms such as bloody diarrhea (odds ratio [OR] = 7.39), proteinuria (OR = 6.16), hematuria (OR = 8.31), oliguria (OR = 17.4) and a pale face (OR = 10.7) were useful for predicting complete HUS. Also, increased white blood cell counts >12,000 microL/mL (OR = 10.0) and C-reactive protein >1.5 mg/dL (OR = 7.39) at the onset of infection, were useful as predictive laboratory parameters. To predict neurological complications in complete HUS patients, the average daily increase of lactate dehydrase >1200 IU/L per day (OR = 26.3) and creatinine >0.5 mg/dL per day (OR = 12) were found to be useful on multivariate logistic regression.

CONCLUSION: There are useful predictive clinical factors for neurological complications in complete HUS.

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