🫁 CRB-65 Score (Pneumonia, Community)
Assess community-acquired pneumonia severity without labs using CRB-65.
Clinical takeaway
No blood tests required (unlike CURB-65).
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When to use
Primary-care/community triage of pneumonia.
How it works
1 point each: Confusion, RR ≥ 30, low BP, Age ≥ 65. 0 low, 1–2 intermediate, 3–4 high.
Key points
- No blood tests required (unlike CURB-65).
- Score 0 may allow home treatment.
- Combine with oxygen saturation and judgement.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Confusion (new) | No |
|---|---|
| Respiratory rate ≥ 30 | No |
| SBP < 90 or DBP ≤ 60 | No |
| Age ≥ 65 | No |
→CRB-650/4
- Disposition：Low (~<1% mortality) — consider home treatment
| Confusion (new) | Yes (+1) |
|---|---|
| Respiratory rate ≥ 30 | Yes (+1) |
| SBP < 90 or DBP ≤ 60 | Yes (+1) |
| Age ≥ 65 | Yes (+1) |
→CRB-654/4
- Disposition：High — urgent hospital admission
Frequently asked questions
- What is CRB-65 Score (Pneumonia, Community)?
- Assess community-acquired pneumonia severity without labs using CRB-65.
- How is CRB-65 Score (Pneumonia, Community) calculated? What is the core formula?
- 1 point each: Confusion, RR ≥ 30, low BP, Age ≥ 65. 0 low, 1–2 intermediate, 3–4 high.
- When is CRB-65 Score (Pneumonia, Community) used?
- Primary-care/community triage of pneumonia.
- What are the key clinical points for CRB-65 Score (Pneumonia, Community)?
- No blood tests required (unlike CURB-65). Score 0 may allow home treatment. Combine with oxygen saturation and judgement.
- What are the limits and cautions when using CRB-65 Score (Pneumonia, Community)?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is CRB-65 Score (Pneumonia, Community) calculated in practice? Can you show a worked example?
- Inputs: Confusion (new) No, Respiratory rate ≥ 30 No, SBP < 90 or DBP ≤ 60 No, Age ≥ 65 No → Result: CRB-65 0 /4（Disposition: Low (~<1% mortality) — consider home treatment） Inputs: Confusion (new) Yes (+1), Respiratory rate ≥ 30 Yes (+1), SBP < 90 or DBP ≤ 60 Yes (+1), Age ≥ 65 Yes (+1) → Result: CRB-65 4 /4（Disposition: High — urgent hospital admission）