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Diagnostic Accuracy of Point-of-care Nitrite and Leukocyte Esterase Dipstick Test for the Screening of Pediatric Urinary Tract Infections
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Diagnostic Accuracy of Point-of-care Nitrite and Leukocyte Esterase Dipstick Test for the Screening of Pediatric Urinary Tract Infections
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Journal Article
Diagnostic Accuracy of Point-of-care Nitrite and Leukocyte Esterase Dipstick Test for the Screening of Pediatric Urinary Tract Infections
2021
Overview
Our study aimed to evaluate the diagnostic performance of point-of-care nitrite and leukocyte esterase (LE) dipsticks in the diagnosis of suspected urinary tract infection (UTI) in infants <6 months (young infants) versus older children. The secondary objectives were to study the dipstick efficacy in children with congenital anomalies of the kidney and urinary tract (CAKUT) versus those without CAKUT; in children with simple UTI versus complicated UTI; and to evaluate the clinico-microbiological profile of children presenting with UTI. In this prospective observational study, cases with suspected UTI were enrolled from pediatric emergency or outpatient departments. Urine was collected for performing the urine dipstick and culture. Descriptive data regarding CAKUT, age, gender, etc., were recorded in a predesigned pro forma. We screened 506 children with suspected UTI, of whom 221 had urine culture positive. Approximately 38.4% of the children with UTI had underlying CAKUT, while 7.6% had renal scars. The most common CAKUT was vesicoureteric reflux (VUR). About 12 patients (2.3%) were known to have CAKUT at the time of enrollment in the study. In infants <6 months, LE dipstick had sensitivity 92%, specificity 89.7%, positive predictive value (PPV) 86.7%, negative predictive value (NPV) 93.8%, likelihood ratio (LR) + 8.9, LR- 0.09. In infants <6 months, nitrite dipstick had sensitivity 38%, specificity 97%, PPV 90.4%, NPV 68%, LR+ 12.6 and LR-0.63. In the age group 6 months to 12 years, the efficacy was better for both dipsticks. In age group more than 6 months to 12 years, LE dipstick had sensitivity 96.4%, specificity 95.8%, PPV 94.8 %, NPV 97.2%, LR+ 22.9, LR- 0.04. In age group more than six months to 12 years, nitrite dipstick had sensitivity 94.7%, specificity 99.5%, PPV 99.3%, NPV 96%, LR+ 189.4, and LR-0.05.
Publisher
Wolters Kluwer India Pvt. Ltd,Medknow Publications and Media Pvt. Ltd,Medknow Publications & Media Pvt. Ltd,Wolters Kluwer Medknow Publications
