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Respiratory Calculator

CURB-65 Score Calculator

Severity assessment and site-of-care decision tool for community-acquired pneumonia.

CURB-65 Criteria
Tick each criterion present. Each scores 1 point (max 5).
C — Confusion
New disorientation (person, place or time) or AMTS ≤8
U — Urea >7 mmol/L
Elevated blood urea nitrogen
R — Respiratory Rate ≥30/min
Tachypnoea indicating respiratory compromise
B — Blood Pressure <90/60 mmHg
Systolic <90 or diastolic <60
65 — Age ≥65 years
Patient age 65 or older
⚠️ CURB-65 is a clinical aid — always use clinical judgement alongside the score.
CURB-65 Result
CURB-65 Score
0
out of 5
Low Severity

CURB-65: The Complete Clinical Guide

Severity scoring for community-acquired pneumonia, site-of-care decisions, antibiotic guidance and ICU criteria

What Is CURB-65?

CURB-65 is a validated clinical prediction rule for assessing the severity of community-acquired pneumonia (CAP) and guiding site-of-care decisions. Developed by Lim et al. and endorsed by the British Thoracic Society (BTS), it scores five variables — Confusion, Urea, Respiratory rate, Blood pressure, and age ≥65 — each worth 1 point. Total score 0–5 stratifies patients into low (outpatient), moderate (consider admission), or high severity (admit, consider ICU).

ScoreSeverity30-Day MortalityManagement
0–1Low<3%Home treatment
2Moderate9%Short stay / supervised
3–5High17–57%Admit, consider ICU

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References

  1. Lim WS, van der Eerden MM, Laing R, et al. Defining community acquired pneumonia severity on presentation to hospital. Thorax. 2003;58(5):377-382.
  2. NICE NG138. Pneumonia (community-acquired): antimicrobial prescribing. Updated 2023.
  3. Mandell LA, Wunderink RG, Anzueto A, et al. IDSA/ATS consensus guidelines on CAP. Clin Infect Dis. 2007;44(Suppl 2):S27-72.

⚠️ Medical Disclaimer: CURB-65 is for educational and documentation purposes only. Always use full clinical assessment. MedDraftPro accepts no clinical liability.

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