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Diehr Rule to Diagnose PneumoniaAka: Diehr Rule

Indications
1. Adult with acute cough
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
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%
References
1. Cayley (2005) Am Fam Physician 72:2012
2. Diehr (1984) J Chronic Dis 37:215

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