Pretest likelihood of 10% (low risk): Sensitivity of 85%, specificity of 50%, positive predictive value of 16% (85/535), negative predictive value of 97% (450/465).
| TEST RESULT | DISEASE | TOTAL | |
|---|---|---|---|
| PRESENT | ABSENT | ||
| Positive | 85 | 450 | 535 |
| Negative | 15 | 450 | 465 |
| Total | 100 | 900 | 1000 |