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Lung and Respiratory - Community-Acquired Pneumonia Severity Index (PSI) for Adults

Community-Acquired Pneumonia Severity Index (PSI) for Adults

Select Criteria:
Sex
M (0 points)
F (-10 points)
Demographic factors
Age (1 point for each year)
Nursing home resident (10 points)
Comorbid illnesses
Neoplastic disease (30 points)
Liver disease (20 points)
Congestive heart failure (10 points)
Cerebrovascular disease (10 points)
Renal disease (10 points)
Physical examination findings
Altered mental status (20 points)
Respiratory rate >= 30/minute (20 points)
Systolic blood pressure < 90 mmHg (20 points)
Temperature < 35 degrees C or >= 40 degrees C (15 points)
Pulse >= 125/minute (10 points)
Laboratory and radiographic findings
Arterial pH < 7.35 (30 points)
Blood urea nitrogen >= 30 mg/dL (11 mmol/L) (20 points)
Sodium < 130 mEq/L (20 points)
Glucose >= 250 mg/dL (14 mmol/L) (10 points)
Hematocrit < 30 percent (10 points)
Partial pressure of arterial oxygen < 60 mmHg or oxygen saturation < 90% (10 points)
Pleural effusion (10 points)
Results: Total Criteria Point Count:
Pneumonia Score Interpretation
0-50 Points:Class I 0.1% Mortality
51-70 Points:Class II 0.6% Mortality
71-90 Points:Class III 0.9% Mortality
91-130 Points:Class IV 9.3% Mortality
131-395 Points:Class V 27.0% Mortality
  1. Fine MJ, Auble TE, Yealy DM, et. al. A prediction rule to identify low-risk patients with community-acquired pneumonia. N Engl J Med. 1997; 336:243-250.
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