Abstract
Background: In 2014, the Thai Pediatric Nephrology Association (TPNA) launched a guideline for febrile urinary tract infection (UTI) in children aged two months to five years. Renal and bladder ultrasound (RBUS) is recommended for first febrile UTI, and voiding cystourethrography (VCUG) is recommended in patients with at least one of eight proposed risk factors. Objective: To compare characteristics of febrile urinary tract infection (UTI), compliance with the imaging study recommendation regarding to the TPNA guide, and kidney, ureter, and bladder (KUB) abnormality detections between children aged two months to two years and older than two years to five years. Materials and Methods: The present study was a retrospective study, reviewed children aged two months to five years presenting with first or recurrent episode of febrile UTI between 2014 and 2019 at Siriraj Hospital. Clinical parameters during febrile UTI, indications to perform VCUG, and kidney, ureter, and bladder (KUB) abnormality detections were compared between the younger group and the older group. RBUS and VCUG undergone according to the recommendation were accounted for the compliance. Results: The mean age of 259 younger and of 51 older age children was 8.2±5.6 and 40.0±10.9 months, respectively. Female gender (p=0.01), complaint of constipation (p=0.03), abnormal bladder emptying (p<0.01), and renal impairment (p=0.03) were more frequent in the older than the younger. Overall imaging study compliance was 73.9% and the KUB abnormality detection was 16.5%. High-grade vesicoureteral reflux (VUR) was more common than low-grade VUR. The rates of compliance (p=0.45) and KUB abnormality detections (p=0.54) between the younger and older children were not different. Conclusion: Female gender, and bladder and bowel dysfunction were associated to febrile UTI in older children. The TPNA febrile UTI guideline imaging recommendation was shown to be applicable in both younger and older children. Keywords: Clinical characteristics; Febrile urinary tract infection; Thai guideline imaging recommendations; Renal and bladder ultrasound; Voiding cystourethrography
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