Streptococcal Pharyngitis Prediction Rule (Walsh)
Info
Temperature >38.3°C (100.9°F) Yes No
Exposure to known streptococcal pharyngitis contact Yes No
Pharyngeal or tonsillar exudates Yes No
Enlarged or tender nodes Yes No
Recent cough Yes No
R e s u l t s
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score
 
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Info
Streptococcal Pharyngitis Prediction Rule (Walsh)

The Walsh Clinical Prediction Rules were developed in a population that had 24% positive cultures.

Overview:

This rule consists of 5 items from which the score is summed

Points : Clinical factor or historical item

  • +1 : Temperature >38.3°C (100.9°F)
  • +1 : Exposure to known streptococcal pharyngitis contact
  • +1 : Pharyngeal or tonsillar exudates
  • +1 : Enlarged or tender nodes
  • -1 : Recent cough

Interpretation:

Score : % Probability of patient having a positive culture for GABHS

  • -1 : 4.6%
  • 0 : 15.9%
  • 1 : 44.4%
  • 2 : 57.1%
  • 3 : 83.3%

GABHS = Group A beta-hemolytic streptococcus

Reference :

McGinn TG, et al. Validation and modification of streptococcal pharyngitis clinical prediction rules. Mayo Clin Proc 2003;78:290,292.