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CRB-65 score for pneumonia severity

Mortality risk in community-acquired pneumonia without lab values.

CRB-65 score for pneumonia severity
Confusion (new disorientation in person, place or time)
Respiratory rate >=30/min
SBP <90 mmHg or DBP <=60 mmHg
Age >=65 years
Result0 points

Approximate 30-day mortality 0.9 %. Low risk; outpatient management often appropriate.

30-day mortality band
0.9 %

When to use

  • Rapid severity assessment of community-acquired pneumonia when urea is unavailable, e.g. in primary care.

Formula

One point each: Confusion, Respiratory rate >=30, low Blood pressure (SBP <90 or DBP <=60), age >=65. Range 0-4.

Pearls and pitfalls

  • Drops the urea term of CURB-65, so it can be scored without bloods.

References

  1. Lim WS, et al. Thorax. 2003;58(5):377-82.