| Risk Level | 30-Day Mortality | Risk Class | Based on: |
|---|---|---|---|
| Low | Less 0.5 percent | I | Algorithm |
| Low | Greater than or equal to 0.5 and less than 1.0 percent | II | 70 or fewer points |
| Low | Greater than or equal to 1.0 and less than 4.0 percent | III | 71-90 points |
| Moderate | Greater than or equal to 4.0 and less than 10.0 percent | IV | 91-130 points |
| High | Greater than or equal to 10.0 percent | V | Greater than 130 points |
Source: 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):243-50.