Predicting severity of community-acquired pneumonia with AMBU-65/CURB-65 score
Prediction tool to define community acquired pneumonia severity on presentation to hospital, recommended by the British Thoracic Society. 
Research authors: Lim W, van der Eerden MM, Laing R, Boersma W, Karalus N, Town G, Lewis S, and Macfarlane J.
  • Pulmonology
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Calculated CURB-65/AMBU-65 score: points

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How this model should be used:
The CURB-65/AMBU-65 model is a one step strategy for stratifying patients with CAP into risk groups according to risk of mortality at 30 days.1

  • Patients with CURB-65 scores 0 and 1 are at low risk of mortality (<2%) and might be suitable for management as hospital outpatients or by their general practitioner.
  • Patients with a score of 2 are at intermediate risk of mortality (9%) and should be considered for hospital supervised treatment.
  • Patients with  a score >2 are at high risk of mortality (>19%) and should be treated in hospital. Initial care in an intensive care or high dependency unit may be appropriate in those with the highest scores.
Although low serum albumin was identified as a strong independent prognostic variable in addition to the CURB score for predicting 30 day mortality, it was not included in the final model as it is not a routinely available test in many hospitals. If serum albumin level is at your disposal, you might consider using a more extended model including serum albumin.

  1. Lim WS, van der Eerden MM, Laing R, et al. Defining community acquired pneumonia severity on presentation to hospital: an international derivation and validation study. Thorax. 2003;58(5):377-82.

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Calculations alone should never dictate patient care, and are no substitute for professional judgement. See our full disclaimer.

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