Table 4.

CURB-65 severity score

Prognostic features

Confusion—abbreviated Mental Test Score ≤8, or new disorientation in person, place, or time

Blood urea >7 mmol litre−1

Respiratory rate ≥30 bpm

Blood pressure—diastolic ≤60 mm Hg or systolic <90 mm Hg

Age ≥65 yr

Risk stratification (each prognostic feature present scores 1 point)

0–1: Low risk (<3% mortality risk)

2: Intermediate risk (3–15% mortality risk)

3–5: High risk (>15% mortality risk)