Table 2. Pneumonia Severity Index (PSI)73.
Adapted from 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(4):243–250; with permission.
| Characteristic | Points |
|---|---|
| Demographic factors | |
| Age (years) | |
| Men | Age |
| Women | Age – 10 |
| Nursing home residence | + 10 |
| Coexisting illness | |
| Malignancy (active) | + 30 |
| Liver disease | + 20 |
| Congestive heart failure | + 10 |
| Cerebrovascular disease | + 10 |
| Chronic kidney disease | + 10 |
| Physical examination findings | |
| Altered mental status | + 20 |
| Respiratory rate ≥30 breaths/minute | + 20 |
| SBP <90 mmHg | + 20 |
| Temperature <35°C (95°F) or ≥40°C (104°F) | + 15 |
| Pulse ≥125 beats/minutes | + 10 |
| Laboratory and radiographic findings | |
| Arterial pH <7.35 | + 30 |
| BUN ≥11 mmol/L or 30 mg/dL | + 20 |
| Sodium < 130 mmol/L | + 20 |
| Glucose ≥14 mmol/L or 250 mg/dL | + 10 |
| Hematocrit <30% | + 10 |
| PaO2 <60 mmHg | + 10 |
| Pleural effusion on chest radiograph | + 10 |
| Total Points | Risk Class | Treatment options |
|---|---|---|
| No comorbidities | I | Outpatient therapy |
| ≤70 | II | Outpatient therapy or brief hospitalization |
| 71 – 90 | III | |
| 91 – 130 | IV | Hospitalization |
| >130 | V |
BUN = blood urea nitrogen; DBP = diastolic blood pressure; SBP = systolic blood pressure