| | |
Yes
|
No
| |
| |
Yes
|
X
|
Y
| |
| |
No
|
Z
|
K
| |
|
Test/Performance Characteristic
| |
Definition
|
Explanation
|
|
Patient Classification, %
| | | |
|
True-Positive
| |
X / (No. of Patients) × 100%
| |
|
False-Positive
| |
Y / (No. of Patients) × 100%
| |
|
True-Negative
| |
K / (No. of Patients) × 100%
| |
|
False-Negative
| |
Z / (No. of Patients) × 100%
| |
|
Sensitivity, %
| |
X / (X+Z) × 100%
|
% of FN hospitalizations correctly identified by claims-based definition
|
|
Specificity, %
| |
K / (Y+K) × 100%
|
% of non-FN hospitalizations correctly identified by claims-based definition
|
|
Positive Predictive Value (PPV), %
| |
X / (X+Y) × 100%
|
% of hosp. identified as FN hosp. by claims-based definition that were true-positives
|
|
Negative Predictive Value (NPV), %
| |
K / (Z+K) × 100%
|
% of hosp. identified as non-FN hosp. by claims-based definition that were true-negatives
|
|
Accuracy, %
| |
(X+K) / (No. of Patients) × 100%
|
% of all hospitalizations that were true-positives and true-negatives
|
|
Likelihood ratio positive (LR+)
| |
[X/(X+Z)] / [1-K/(Y+K)]
|
Odds of hosp. being an FN hosp. when claims-based algorithm is positive
|
|
Likelihood ratio negative (LR-)
| |
[1-X/(X+Z)] / [K/(Y+K)]
|
Odds of hosp. being a non-FN hosp. when claims-based algorithm is negative
|
