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Acute Streptococcal Pharyngitis: Likelihood Ratios

Introduction: None written.

[Edit Diagnosis] [Merge dx] [Add prevalence]

Tags: Infection Tag this Diagnosis.

Differential Diagnoses include: Kawasaki Disease, Viral Pharyngitis

The likelihood ratios of findings for Acute Streptococcal Pharyngitis are listed below. See the left navigation bar to change the display.

Combination of Tests

Finding +LR-LR Comments, Study
Centor Criteria
Duplicate Edit		 1.50.9

=4 criteria:

  • subjective or objective fever (>38C)
  • exudative pharyngitis
  • lack of cough
  • tender cervical LAD

    • Study: Br J Gen Pract. 2005 Aug;55(517):615-9. PMID: 16105370
    Centor Criteria
    Duplicate Edit    		 1.50.8

    >=3 criteria:

  • subjective or objective fever (>38C)
  • exudative pharyngitis
  • lack of cough
  • tender cervical LAD

    • Study: Br J Gen Pract. 2005 Aug;55(517):615-9. PMID: 16105370
    Centor Criteria
    Duplicate Edit    		 1.40.9

    =3 criteria:

  • subjective or objective fever (>38C)
  • exudative pharyngitis
  • lack of cough
  • tender cervical LAD

    • Study: Br J Gen Pract. 2005 Aug;55(517):615-9. PMID: 16105370
    Modified Centor Criteria Edit 10.60.2

    =>2 criteria:

  • history of objective fever (>38C)
  • exudative pharyngitis
  • lack of cough
  • tender cervical LAD
  • +1 for <=15 years old, -1 for >45 years old

    • Differential Diagnosis: Viral Pharyngitis

    Study: CMAJ. 2000 Oct 3;163(7):811-5. PMID: 11033707

    rather similar results also in JAMA. 2004 Apr 7;291(13):1587-95. PMID: 15069046

    Physical Exam

    Finding +LR-LR Comments, Study
    hearing loss Edit 2.90.9

    >100.5F

    Study: Acad Emerg Med. 2000 Oct;7(10):1104-9. PMID: 11015241

    Renal

    Finding +LR-LR Comments, Study
    hearing loss Edit 2.90.9

    >100.5F

    Study: Acad Emerg Med. 2000 Oct;7(10):1104-9. PMID: 11015241

    Vital Signs

    Finding +LR-LR Comments, Study
    hearing loss Edit 2.90.9

    >100.5F

    Study: Acad Emerg Med. 2000 Oct;7(10):1104-9. PMID: 11015241

    Untagged

    Finding +LR-LR Comments, Study
    Physical Exam Edit 3.10.4

    all 4: Tender Adenopathy, Pharyngeal Exudates, Pharyngeal Erythema, and Enlarged Tonsils

    Study: Acad Emerg Med. 2000 Oct;7(10):1104-9. PMID: 11015241
    Rapid Streptococcal Antigen Test
    Duplicate Edit    		 830.2

    Study: JAMA. 2004 Apr 7;291(13):1587-95. PMID: 15069046
    Rapid Streptococcal Antigen Test
    Duplicate Edit    		 8.30.1

    Study: no study specified.
    Throat Culture Edit inf0

    Study: JAMA. 2004 Apr 7;291(13):1587-95. PMID: 15069046

     

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