|
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%
