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  • Title: Diagnostic accuracy of criteria for urinary tract infection in a cohort of nursing home residents.
    Author: Juthani-Mehta M, Tinetti M, Perrelli E, Towle V, Van Ness PH, Quagliarello V.
    Journal: J Am Geriatr Soc; 2007 Jul; 55(7):1072-7. PubMed ID: 17608881.
    Abstract:
    OBJECTIVES: To prospectively evaluate nursing home residents with suspected urinary tract infection (UTI) to determine whether they met the McGeer, Loeb, or revised Loeb consensus-based criteria and whether any set of criteria was associated with laboratory evidence of UTI, namely bacteriuria (>100,000 colony forming units) plus pyuria (>10 white blood cells). DESIGN: Prospective cohort study. SETTING: Three New Haven-area nursing homes. PARTICIPANTS: Of 611 residents screened, 457 were eligible, 362 consented, and 340 enrolled. MEASUREMENTS: Participants underwent prospective surveillance from May 2005 to April 2006 for the development of suspected UTI (defined as a participant's physician or nurse clinically suspecting UTI). One hundred participants with suspected UTI and a urinalysis and urine culture performed were included in the analyses. RESULTS: Participants were identified who met the criteria of McGeer, Loeb, revised Loeb, and laboratory evidence of UTI. Using laboratory evidence of UTI as the outcome, the McGeer criteria demonstrated 30% sensitivity, 82% specificity, 57% positive predictive value (PPV), and 61% negative predictive value (NPV); the Loeb criteria showed 19% sensitivity, 89% specificity, 57% PPV, and 59% NPV; and the revised Loeb criteria demonstrated 30% sensitivity, 79% specificity, 52% PPV, and 60% NPV. CONCLUSION: All of the consensus-based criteria have similar test characteristics. The diagnostic accuracy of UTI criteria in nursing home residents could be improved, and the data suggest that evidence-based clinical criteria associated with laboratory evidence of UTI need to be identified and validated.
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