Table 5. Pneumonia severity index (PSI).
| Factor | Score | |
|---|---|---|
| Patient age | ||
| Male | Age | |
| Female | Age - 10 | |
| Long-term care facility resident | +10 | |
| Accompanying diseasea | ||
| Neoplastic disease | +30 | |
| Liver disease | +20 | |
| Congestive heart failure | +10 | |
| Cerebrovascular disease | +10 | |
| Chronic kidney disease | +10 | |
| Symptoms at diagnosis | ||
| Acute psychosisb | +20 | |
| Breathing rate ≥30/min | +20 | |
| Systolic pressure <90 mmHg | +15 | |
| Body temperature <35°C or ≥ 40°C | +15 | |
| Heart rate ≥125/min | +10 | |
| Laboratory measurements | ||
| Arterial blood pH <7.35 | +30 | |
| BUN ≥30 mg/dL | +20 | |
| Serum sodium <130 mEq/L | +20 | |
| Serum glucose >250 mg/dL | +10 | |
| Hb <9 gm/dL (hematocrit <30%) | +10 | |
| Atmospheric arterial blood gas (PaO2) <60 mmHg (SaO2 <90%) | +10 | |
| Hydrothorax on chest X-rays | +10 | |
aAccompanying diseases (Neoplastic diseases: within one year, exclude cutaneous basal cell carcinoma and squamous cell carcinoma; liver disease: clinically or histologically diagnosed liver cirrhosis or chronic active hepatitis; congestive heart failure: medical history, examination, or tests; cerebrovascular diseases: stroke diagnosed based on clinical findings, CT or MRI).
bPsychosis: Disorientation related to people, places, and time; or recently reduced level of consciousness.