The CURB-65 is a simple scoring system easily used in the outpatient office or emergency room setting, which assigns 1 point for each of 5 clinical features:
A single point is given for the presence of delirium or confusion, a blood urea nitrogen value greater than or equal to 20, a respiratory rate greater than or equal to 30, a systolic blood pressure less than 90 mm Hg or a diastolic blood pressure less than or equal to 60, and an age greater than or equal to 65 years of age.
If the cumulative score is 0 or 1, then most likely this patient could be safely treated as an outpatient.
A score of 2 might suggest closely supervised outpatient treatment, or inpatient observation admission. A score of 3, 4, or 5 would usually indicate inpatient treatment.
It is important to emphasize that clinical judgment should be the primary factor in the decision for hospital admission, with the CURB-65 score providing assistance with this decision.