CURB-65 Pneumonia Severity

Estimates community-acquired pneumonia severity and mortality risk to guide the inpatient-vs-outpatient decision.

For healthcare professionals.These calculate a score or a measurement from values you enter. They do not diagnose, and they are no substitute for clinical judgement. If you are a patient, discuss any result with your own doctor rather than acting on it.

New confusion (disorientation to person, place, or time)

Blood urea nitrogen > 19 mg/dL (or urea > 7 mmol/L)

Respiratory rate ≥ 30/min

SBP < 90 mmHg or DBP ≤ 60 mmHg

Age ≥ 65 years

Result

0 points

Low risk

Low risk. Outpatient treatment likely appropriate.

Do not use when

A clinical decision aid, not a replacement for clinical judgment — hypoxemia, comorbidities, and social factors (ability to return, home support) should also weigh into the disposition decision.

Source

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.

Shown for reference and checked against the source above. Confirm against current guidance before acting on it, and use your own clinical judgement.

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