- Accuracy of a Test:
- percentage of patients in which the test gives a correct answer;
- the following equation is used to calculate accuracy:
(true positives + true negatives) / (true positives + true negatives + false positives and false negatives);
- Sensitivity:
- refers to the ability of a test to pick up an abnormatily;
- the following equation is used to calculate sensitivity:
(true positives) / (true positive + false negatives)
- Specificity:
- refers to the ability of a test to yield true positives;
- the following equation is used to calculate specificity:
(true negatives) / (true negatives + false positives)
Fundamentals of Statistics for Orthopaedists: Part IV.
