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A clinical decision rule for management of streptococcal pharyngitis in low-resource settings

Mark C Steinhoff1, Christa Fischer Walker, Anne W Rimoin

  • 1Department of International Health, Bloomberg School of Public Health, Department of Pediatrics, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA. msteinho@jhsph.edu

Acta Paediatrica (Oslo, Norway : 1992)
|September 29, 2005
PubMed

Insights

A new clinical prediction rule for group A beta-hemolytic streptococcal (GABHS) pharyngitis accurately identifies over 90% of infections in children. This rule can reduce unnecessary antibiotic use by 40% in resource-limited settings.

Area of Science:

  • Pediatrics
  • Infectious Diseases
  • Clinical Diagnostics

Background:

  • Many children globally lack access to laboratory facilities for diagnosing streptococcal pharyngitis.
  • Clinical prediction rules can aid antibiotic therapy decisions and reduce unnecessary treatments in resource-limited areas.

Purpose of the Study:

  • To develop and validate a clinical prediction rule for group A beta-hemolytic streptococcal (GABHS) pharyngitis in children.
  • To assess the rule's utility in settings without laboratory diagnostics.

Main Methods:

  • Prospective cohort study of 410 children (2-12 years) with sore throat in Cairo, Egypt.
  • Bivariate and multivariate analyses to identify diagnostic signs and symptoms.
  • Development of a cumulative score using key clinical variables.

Main Results:

  • 24.6% of children had positive GABHS cultures.
  • Pharyngeal exudate, enlarged cervical lymph nodes, season, absence of rash, cough, or rhinitis were associated with GABHS.
  • A three-variable rule (enlarged nodes, no rash, no rhinitis) achieved 92% sensitivity and 38% specificity.

Conclusions:

  • The developed three-variable clinical prediction rule for GABHS is a valuable tool for settings lacking laboratory diagnostics.
  • The rule identifies over 90% of true GABHS cases.
  • Implementation can decrease antibiotic prescriptions for GABHS-negative pharyngitis by approximately 40%.
Abstract

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