Strep Throat Decision Tool



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Modified Centor Score[html]
This calculator applies the Centor criteria for pharyngitis.
AAFP article Choby (2009) Am Fam Physician 79:383-390.[/html]
[select name="Q1Fever" value="No (0 points)=0|YES (1 point)=1"] <-- History of fever or measured temperature > 100.4 degrees F
[select name="Q2Cough" value="Cough is present (0 points)=0|COUGH IS ABSENT (1 point)=1"] <-- Presence of coughing
[select name="Q3Nodes" value="No (0 points)=0|YES (1 point)=1"] <-- Tender anterior cervical nodes
[select name="Q4Tonsil" value="No (0 points)=0|YES (1 point)=1"] <-- Tonsillar swelling or exudates
[select name="Q5Age" value="< 15 years (1 point)=1|15 to 45 years (0 points)=0|> 45 years (-1 point)=-1"] <-- Age
Score --> [calc value="score=(Q1Fever)+(Q2Cough)+(Q3Nodes)+(Q4Tonsil)+(Q5Age)" memo="score"]
Interpretation --> Risk of group A beta-hemolytic streptococcus is [calc value="score=(Q1Fever)+(Q2Cough)+(Q3Nodes)+(Q4Tonsil)+(Q5Age);score>3?'51 to 53%, consider empiric antibiotic treatment.':score>2?'28 to 35%, perform throat culture or rapid antigen detection testing and treat accordingly.':score>1?'11 to 17%, perform throat culture or rapid antigen detection testing and treat accordingly.':score>0?'5 to 10%, may forgo antibiotics OR may perform throat culture or rapid antigen detection testing and treat accordingly.':'1 to 2.5%, antibiotic treatment or further testing is not warranted.'" memo=Risk and Recommendation"]
Modified Centor Score
This calculator applies the Centor criteria for pharyngitis.
AAFP article Choby (2009) Am Fam Physician 79:383-390.

<-- History of fever or measured temperature > 100.4 degrees F
<-- Presence of coughing
<-- Tender anterior cervical nodes
<-- Tonsillar swelling or exudates
<-- Age
Score --> scorescore=(Q1Fever)+(Q2Cough)+(Q3Nodes)+(Q4Tonsil)+(Q5Age)
Interpretation --> Risk of group A beta-hemolytic streptococcus is Riskscore=(Q1Fever)+(Q2Cough)+(Q3Nodes)+(Q4Tonsil)+(Q5Age);score>3?'51 to 53%, consider empiric antibiotic treatment.':score>2?'28 to 35%, perform throat culture or rapid antigen detection testing and treat accordingly.':score>1?'11 to 17%, perform throat culture or rapid antigen detection testing and treat accordingly.':score>0?'5 to 10%, may forgo antibiotics OR may perform throat culture or rapid antigen detection testing and treat accordingly.':'1 to 2.5%, antibiotic treatment or further testing is not warranted.'
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