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Iranian Journal of Pediatrics
Tehran University of Medical Sciences Press
ISSN: 1018-4406
EISSN: 1018-4406
Vol. 19, No. 4, 2009, pp. 381-386
Bioline Code: pe09045
Full paper language: English
Document type: Research Article
Document available free of charge

Iranian Journal of Pediatrics, Vol. 19, No. 4, 2009, pp. 381-386

 en Comparison of Procalcitonin and C-Reactive Protein Tests in Children with Urinary tract infection
Ayazi, Parviz; Mahyar, Abolfazl; Hashemi, Hassan Jahani; Daneshi, Mohammad-Mahdi; Karimzadeh, Toktam & Salimi, Fatemeh


Objective: Urinary tract infection (UTI) is a common disease in children. The distinction between upper and lower UTI in children is associated with some ambiguities. The objective of this study was to determine the sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of procalcitonin (PCT) compared to C-reactive protein (CRP) in predicting renal involvement.
Methods: Serum concentrations of PCT and CRP in blood samples of 111 children with UTI were measured. Renal parenchymal involvement was evaluated with 99mTc-dimercaptosuccinic acid (DMSA) scintigraphy. Sensitivity, specificity, PPV and NPV were determined.
Findings: Out of 111 children, 52 (46.8%) were shown to have acute renal involvement, 23 (20.7%) lower UTI, and 36 (32.5%) refused to be examined by DMSA renal scan. PCT was positive in 36 (69.2%) patients with upper UTI and 12 (52.2%) with lower UTI. The sensitivity, specificity, PPV and NPV obtained for PCT and CRP were 70.6, 45.5, 75, 40% and 96.2, 4.3, 69.4, and 33.3%, respectively.
Conclusion: No significant correlation was found between renal parenchymal involvement and serum levels of PCT and CRP. However, the results demonstrated that the PCT was a better diagnostic test compared to CRP.

Pyelonephritis; UTI; Procalcitonin; Serum marker; Children; C-reactive protein

© © 2009 by Center of Excellence for Pediatrics, Children’s Medical Center, Tehran University of Medical Sciences,All rights reserved.
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