| Predictor | n | OR (CI) | p Value |
| Systolic blood pressure <90 mm Hg | 187 | 5.6 (3.4–9.4) | <0.0001 |
| Diastolic blood pressure ⩽60 mm Hg | 282 | 2.9 (1.8–4.7) | 0.0001 |
| Mean arterial pressure <70 mm Hg | 259 | 4.6 (2.9–7.3) | <0.0001 |
| Pulse pressure ⩽40 mm Hg | 240 | 1.7 (1.1–2.6) | 0.02 |