CURB-65 Severity Antibiotic Tier Calculator

Stratify CAP severity using CURB-65 to guide antibiotic selection and admission decision. Score 0-1: home; 2: hospital; 3-5: ICU consideration.

Urea (mmol/L)
Respiratory rate (/min)
Systolic BP (mmHg)
Diastolic BP (mmHg)
Age (years)
Clinical criterion
0/ 5
Low — 30-day mortality <3%
Recommended disposition

Outpatient therapy appropriate

Clinical Guidance

CURB-65 predicts 30-day mortality in community-acquired pneumonia and guides the site of care. Each criterion present adds one point: new confusion, urea above 7 mmol/L, respiratory rate of 30 or more, systolic blood pressure below 90 mmHg or diastolic at or below 60 mmHg, and age 65 or older. A score of 0–1 is low risk and can usually be managed as an outpatient; a score of 2 warrants a short inpatient stay or supervised outpatient care; a score of 3 or more indicates severe pneumonia requiring hospitalization, with ICU strongly recommended at scores of 4–5.

The score is a decision aid, not a substitute for clinical judgment. Always combine it with the full clinical picture, oxygen saturation, and local protocols.

Advertisement

How It Works

Stratify CAP severity using CURB-65 to guide antibiotic selection and admission decision. Score 0-1: home; 2: hospital; 3-5: ICU consideration

Each component has a specific meaning:

  • CURB-65 — The curb-65 recorded for the scenario being assessed.

Note: Interpret the curb-65 result against the thresholds and context described above.

How to Use

Enter the CURB-65 for the scenario you are assessing. Stratify CAP severity using CURB-65 to guide antibiotic selection and admission decision. Score 0-1: home; 2: hospital; 3-5: ICU consideration. Use the curb-65 result to inform your calculation.

Frequently Asked Questions