Effects of Prevalence on Diagnostic Tests
2 X 2 Table: Sensitivity and Specificity
| Breast Cancer |
Total |
||
| Positive |
Negative |
||
| Physical Examination | |||
| Positive (lump) |
20 | 80 | 100 |
| Negative (no lump) | 5 | 695 | 700 |
| Total | 25 | 775 | 800 |
Multi-choice
Calculate the sensitivity and specificity of the physical exam of the breast in the diagnosis of breast cancer. Which of the following are the sensitivity and specificity of the physical exam?
|
20% and 90%
| |
|
90% and 80%
| |
|
20% and 99%
| |
|
80% and 90%
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80% and 20%
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