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The Validity of the Rapidly Diagnostic Tests for Early Detection of Urinary Tract Infection
Mustafa Yı́ldı́rı́m, İdris Şahın, Abdülkadir Küçükbayrak, Şükrü Öksüz, Selda Acar, Mustafa Yavuz
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Abstract
Urinary tract infectious (UTI) is the most common of all bacterial infections; the purpose of the present study was to determine the validity of rapidly diagnostic tests for the early detection of UTIs in patients. 128 patients who had UTIs and control group consisted of 128 subjects who had not UTIs were included to the study. Urine specimens obtained from the patients were evaluated for possible UTI by Gram staining, microscopic pyuria, dipstick (nitrite and leukocyte esterase), and quantitative urine culture. Using the quantitative urine culture as the gold standard (reference test), the sensitivity, specificity, and positive (PPV) and negative predictive values (NPV) of all the screening tests were determined and compared. The sensitivity, specificity, PPV, and NPV for the four screening methods were calculated against the urine culture (reference method) for the diagnosis of UTI. In conclusion, validity of Gram stain was found higher compared to other rapid diagnostic tests.