Relevance of Screening for Urinary Tract Infection in Well Infants with Prolonged Jaundice: A Prospective Cohort Study

Background:  Recent retrospective studies suggest irrelevance of urine screening for neonate with prolonged jaundice. We re-evaluated the incidence of urinary tract infection (UTI) among these infants, their renal outcome and evaluated the cost incurred. Methods: This is a prospective cohort study. Asymptomatic, prolonged jaundiced infants with unconjugated hyperbilirubinemia were screened for evidence of UTI as per local guidelines. Infants with pyuria would have urine sent for culture and sensitivity. Unit cost was referenced from hospital purchase. Statistical analysis was performed using SPSS 24.0.  Results: A total of 291 cases were analyzed. Majority were term infants (93.8%). The commonest cause of prolonged jaundice was breast milk jaundice, hence an incidence rate of 0.34%. Only one infant persistently showed single uropathogen on urinary culture with concurrent pyuria. Urinary structures were normal on ultrasonography and there was no evidence of renal cortical scarring. No recurrence of UTI documented in the first year of life. Each “clean-catch” urinalysis costed RM7. This unit cost escalated to RM37 for catheterized sample.  A negative urine culture costed RM28 while a positive culture twice this price. The average cost effectiveness ratio (ACER) in this study was RM5856.56 per detection of case.    Conclusion: Incidence of UTI is low. In our study, an undesirable outcome is negligible. Unnecessary parental anxiety from the potentially laborious procedure could be avoided. This study refutes previous literature to include such screening in prolonged jaundice as this may well be irrelevant.