Multivariable logistic regression model in derivation cohort
| OR | P value | 95% CI | |
| Tachycardia (HR >100 beats/min) | 2.26 | <0.01 | 1.33 to 3.82 |
| Low Hb (<125 g/L) | 2.16 | <0.01 | 1.55 to 3.01 |
| Urea to creatinine ratio >100 | 3.58 | <0.01 | 2.07 to 6.19 |
| Chronic liver disease | 3.17 | <0.01 | 1.78 to 5.65 |
| High CRP (>50 mg/L) | 0.41 | <0.01 | 0.21 to 0.79 |
| Alternate diagnosis* | 0.17 | <0.01 | 0.07 to 0.42 |
*Acute alternative diagnosis for anaemia, haemodynamic instability or urea rise.
CRP, C reactive protein; Hb, haemoglobin.