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Streptococcal pharyngitis in children: a meta-analysis of clinical decision rules and their clinical variables

Flore Le Marechal1, Alain Martinot, Alain Duhamel

  • 1Univ Lille Nord-de-France, UDSL, Lille, France.

BMJ Open
|March 12, 2013
PubMed

Insights

This study evaluated clinical decision rules (CDRs) for diagnosing group A streptococcal (GAS) pharyngitis in children. The Joachim et al. rule shows promise in identifying children unlikely to have GAS, potentially reducing unnecessary antibiotic use.

Area of Science:

  • Pediatrics
  • Infectious Diseases
  • Clinical Decision Making

Background:

  • Group A streptococcal (GAS) pharyngitis is common in children.
  • Accurate diagnosis is crucial to guide antibiotic treatment and prevent complications.
  • Clinical decision rules (CDRs) can aid in diagnosing GAS pharyngitis, but their effectiveness varies.

Purpose of the Study:

  • To identify the most effective clinical decision rules (CDRs) for diagnosing group A streptococcal (GAS) pharyngitis in pediatric patients.
  • To determine if symptom combinations can reliably exclude GAS infection in children presenting with pharyngitis.

Main Methods:

  • Systematic review and meta-analysis of original articles on CDRs for pediatric GAS pharyngitis.
  • Screened multiple databases (Pubmed, OVID, ISTIS, Cochrane) from 1975-2010.
  • Assessed methodological quality and performed meta-analysis to evaluate CDR performance, focusing on low false-negative rates.

Main Results:

  • Identified 4 derived and 12 validated CDRs from 171 references, involving over 10,000 children.
  • No single symptom was sufficient for diagnosis; the Joachim et al. CDR demonstrated a negative likelihood ratio of 0.3.
  • The Joachim et al. rule resulted in a 10.8% overall false-negative rate, comparable to rapid diagnostic tests in some scenarios.

Conclusions:

  • The Joachim et al. CDR can help clinicians avoid unnecessary antibiotic treatment for approximately 35% of children with pharyngitis.
  • This CDR is particularly useful for clinicians not using rapid diagnostic tests.
  • Its specificity is limited, suggesting its use to target rapid diagnostic tests toward high-risk children, thereby reducing antibiotic consumption.
Abstract

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