Mortality data for patients in the intensive care unit (ICU) in a health care facility, collected over 8-hour intervals, are shown in given Table. Since patients have varying risks, the predicted mortality from a logistic regression model that uses the patient's APACHE score (severity of disease) is also shown.
Construct a risk-adjusted chart for the mortality proportion and comment on the ICU performance.
| Table : Mortality Data on ICU Patients |
| Summary |
Subgroup Number |
| 1 |
2 |
3 |
4 |
5 |
6 |
| Number of deaths |
2 |
1 |
2 |
2 |
1 |
1 |
| Number of Patients |
8 |
6 |
8 |
7 |
8 |
8 |
| Patient |
Predicted Mortality based on Severity of Disease |
|
| 1 |
0.5 |
0.6 |
0.3 |
0.4 |
0.7 |
0.6 |
| 2 |
0.8 |
0.5 |
0.7 |
0.6 |
0.3 |
0.4 |
| 3 |
0.4 |
0.8 |
0.5 |
0.5 |
0.6 |
0.8 |
| 4 |
0.6 |
0.4 |
0.5 |
0.8 |
0.5 |
0.6 |
| 5 |
0.8 |
0.6 |
0.5 |
0.4 |
0.7 |
0.7 |
| 6 |
0.3 |
0.8 |
0.6 |
0.6 |
0.4 |
0.6 |
| 7 |
0.5 |
|
0.8 |
0.3 |
0.5 |
0.8 |
| 8 |
0.4 |
|
0.8 |
|
0.4 |
0.7 |