Alberta Health Services clinical adverse event rating
| Grading | Description |
| 1 | There were no clinical adverse events detected. |
| 2 | There were no clinical adverse events detected. However, there were opportunities identified to improve care during hospitalisation. |
| 3 | There was a clinical adverse event(s) detected that was unlikely to have contributed to a poor or unexpected outcome for the patient. |
| 4 | There was a clinical adverse event(s) detected that directly contributed to a poor or unexpected outcome for the patient. |
| A clinical adverse event is defined as an event that could or does result in an unintended injury or complication arising from healthcare management with outcomes that may include (but are not limited to) death or serious harm. | |