TRISS Method | deaths | survivors |
|---|
| | Od | Os |
Positive (P(s) < 50%) | TP | FP |
| |
a = 39
| b = 0 |
| | EOd | Us |
Negative (P(s) > 50%) | FN | TN |
| |
c = 34
| d = 90 |
| | c1 = Pd = 30 | EOs |
| |
c2 = nonPd = 4
| |
| | Ud = Pd+nonPd | |
- Differences between misclassification rate and w-statistic and adjusted misclassification rate and adjusted W statistic where Pd are identified. Adjusted misclassification rate drops from previous 20.8% on reliable 2.4%.
- Misclassification rate = (b + c)/N = (0+34)/163 = 20.8%
- Adjusted misclassification rate = (b+c-Pd)/N = (0+34-30)/163 = 4/163 = 2.4%
- W statistic = (b-c)/N = (0–34)/163 = -20.8%
- Adjusted w- statistic = (b - Pd)/N = (0–30)/163 = -18.4%
