Significance of routine urinalysis in the diagnosis of urinary tract infection

Abstract

Abstract:

Objective　To evaluate the significance of routine urinalysis in the diagnosis of urinary tract infection. Methods　A total of 586 patients undergoing routine urinalysis and with mid-stream urine culturing as positive and 500 healthy subjects were enrolled. The areas under receiver operating characteristic（ROC） curves（AUC） of white blood cell（WBC）， leukocyte esterase（LEU） and nitrate（NIT） were analyzed. The sensitivities， specificities， positive predictive values and negative redictive values of WBC， LEU and NIT serial and parallel detections were calculated. Results　The AUC of WBC， LEU and NIT were 0.852， 0.822 and 0.706. The sensitivities of WBC， LEU and NIT serial and parallel detections were 82.6%， 83.6%， 43.8%， 41.4% and 87.2%， the specificities were 74.0%， 73.0%， 96.8%， 98.0% and 67.2%， the positive predictive values were 78.9%， 78.4%， 94.1%， 96.0% and 75.7%， and the negative predictive values were 78.4%， 79.2%， 59.5%， 58.8% and 81.8%. Conclusions　Routine urinalysis is a rapid and simple test with good sensitivity and specificity， and is applicable for the early diagnosis and fast screening of urinary tract infection， especially for male patients.

Key words: Routine urinalysis, Mid-stream urine culturing, Urinary tract infection, Receiver operating characteristic curve

CLC Number:

R446.1

FAN Hongjia, TANG Jin, WANG Jianqiang, CHEN Weibin, CHEN Yu, GAO Feng. Significance of routine urinalysis in the diagnosis of urinary tract infection[J]. , 2014, 29(12): 1207-1211.

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