Diehr Rule to Diagnose Pneumonia

Aka: Diehr Rule to Diagnose Pneumonia, Diehr Rule

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II. Indications

  1. Adult with acute cough

III. Criteria

  1. Rhinorrhea: -2 points
  2. Sore Throat: -1 point
  3. Myalgia: 1 point
  4. Night Sweats: 1 point
  5. Sputum produced throughout day: 1 point
  6. Respiratory Rate over 25 breaths per minute: 2 points
  7. Temperature over 100 F or 37.8 C: 2 points

IV. Interpretation of total point score

  1. Points -3: Pneumonia probablity = 0.0%
  2. Points -2: Pneumonia probablity = 0.7%
  3. Points -1: Pneumonia probablity = 1.6%
  4. Points 0: Pneumonia probablity = 2.2%
  5. Points 1: Pneumonia probablity = 8.8%
  6. Points 2: Pneumonia probablity = 10.3%
  7. Points 3: Pneumonia probablity = 25%
  8. Points >3: Pneumonia probablity = 29.4%

V. References

  1. Cayley (2005) Am Fam Physician 72:2012-21 [PubMed]
  2. Diehr (1984) J Chronic Dis 37:215-25 [PubMed]

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