Table 1 Association of CURB-65 criteria with 30-day mortality (n = 1230)
| Criteria | Alive (%) | Dead (%) | OR (95% CI) |
| Confusion | 18 (81.8) | 4 (18.2) | 22.148 (6.516-75.288) |
| Urea > 7 mmol•L−1 | 70 (89.7) | 8 (10.3) | 16.343 (5.957-44.838) |
| Respiratory rate ≥ 30 breaths/min | 28 (93.3) | 2 (6.7) | 6.051 (1.313-27.896) |
| Low blood pressure | 172 (97.7) | 4 (2.3) | 2.019 (0.644-6.333) |
| Age≥ 65 yrs | 322 (95.8) | 14 (4.2) | 19.391 (4.383-85.789) |