Antibiotics for the prevention of urinary tract infection in children: A systematic review of randomized controlled trials

J Pediatr. 2001 Jun;138(6):868-74. doi: 10.1067/mpd.2001.113785.


Objective: The objective was to evaluate the effectiveness of low-dose, long-term antibiotics for the prevention of symptomatic urinary tract infection (UTI) in children.

Design: This was a systematic review of randomized controlled trials with a random effects model meta-analysis.

Participants: Five trials involving 463 children were performed.

Results: Three trials (n = 392) evaluated the effectiveness of long treatment courses of antibiotics (2 to 6 months) for children with acute UTI to prevent subsequent, off-treatment infection. Only 2 trials (n = 71) evaluated the effectiveness of long-term, low-dose antibiotics to prevent on-treatment UTI. Very few of the children enrolled in the trials were boys, had abnormal renal tracts, or were infants. The trial quality was poor, with a lack of blinding, and unstated UTI definitions were almost universal. Long-term antibiotic administration reduced the risk of UTI with treatment (relative risk 0.31, 95% confidence limits 0.10 to 1.00), but there was significant heterogeneity (Q = 13.45, P <.01), and there was no sustained benefit once antibiotics had ceased (relative risk 0.79, 0.61 to 1.02).

Conclusions: Methodologic and applicability problems with published trials mean that there is considerable uncertainty about whether long-term, low-dose antibiotic administration prevents UTI in children. Well-designed, randomized, placebo-controlled trials are still required to evaluate this commonly used intervention.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review
  • Systematic Review

MeSH terms

  • Anti-Bacterial Agents / administration & dosage*
  • Child
  • Female
  • Humans
  • Male
  • Randomized Controlled Trials as Topic
  • Research Design
  • Treatment Outcome
  • Urinary Tract Infections / prevention & control*


  • Anti-Bacterial Agents