Prediction Model
Simplified Walsh Clinical Prediction Guide
Arch Int Med 1975;135:1493-1497
Predictor
Points
Temperature > 100.9F
+1
Exposure to strep pharyngitis contact
+1
Recent cough
-1
Pharyngeal or tonsillar exudate
+1
Enlarged or tender nodes
+1
Likelihood of Strep Pharyngitis
Patient's Score
Likelihood Ratio
-1
0.16
0
0.616
1
2.61
2
4.34
3
16
4
> 16