From: Case-mix and the use of control charts in monitoring mortality rates after coronary artery bypass
Observed mortality rate | Risk Adjusted mortality rate | |||
---|---|---|---|---|
Special cause variation (low) | Common cause variation | Special cause variation (high) | Total | |
Special cause variation (low) | 2 | 4 | 0 | 6 |
Common cause variation | 0 | 281 | 6 | 287 |
Special cause variation (high) | 0 | 3 | 2 | 5 |
Total | 2 | 288 | 8 | 298 |