Performance of the nine Melbourne Activation Criteria (MAC)
| Number Patients (n=1000) | Number of observations (n=9075) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Adverse outcome | No adverse outcome | ||||||||
| MAC transgressed | MAC transgressed | ||||||||
| MAC | Transgressed MAC at least once during admission | Yes | No | Yes | No | Sensitivity | Specificity | Positive predictive value | Negative predictive value |
| Nurse/doctor worried | 84 | 17 | 65 | 121 | 8872 | 20.7 | 98.7 | 12.3 | 99.3 |
| Airway threat | 92 | 19 | 63 | 271 | 8722 | 23.2 | 97.0 | 6.6 | 99.3 |
| Hypoxaemia | 46 | 9 | 73 | 71 | 8922 | 11.0 | 99.2 | 11.3 | 99.2 |
| Respiratory distress | 76 | 37 | 45 | 238 | 8755 | 45.1 | 97.4 | 13.5 | 99.5 |
| Tachypnoea | 190 | 34 | 48 | 545 | 8448 | 41.5 | 93.9 | 5.9 | 99.4 |
| Tachycardia/bradycardia | 322 | 22 | 60 | 664 | 8329 | 26.8 | 92.6 | 3.2 | 99.3 |
| Hypotension | 30 | 0 | 82 | 129 | 8864 | 0 | 98.6 | 0 | 99.1 |
| Acute change neurological state/convulsion | 17 | 1 | 81 | 25 | 8968 | 1.2 | 99.7 | 3.8 | 99.1 |
| Cardiac/respiratory arrest | 0 | 0 | 82 | 0 | 8993 | 0 | 100.0 | Not applicable | 99.1 |
| Transgressed one or more MAC | 478 | 56 | 26 | 1515 | 7478 | 68.3 | 83.2 | 3.6 | 99.7 |