Table 1
Statistical calculations used for analysis27
| Term | Definition | Formula |
|---|---|---|
| Sensitivity | Likelihood that the diagnostic test will indicate the presence of disease when the disease is actually present | T+ ÷ (T+ + F−) |
| Specificity | Likelihood that the diagnostic disease will indicate the absence of disease when the disease is actually absent | T− ÷ (T− + F+) |
| Positive likelihood ratio | Indicates how much more likely it is to get a positive test in a person with than without the disease |
|
| Negative likelihood ratio | Indicates how much more likely it is to get a negative test in a person without than with the disease |
|
F+ = false positive; F− = false negative; T+ = true positive; T− = true negative.