Table 3.
Probability of having Lyme disease given a positive test
| Lyme disease/HIV test comparison | Disease prevalence in clinically diagnosed cases
|
||||||
|---|---|---|---|---|---|---|---|
| 5% | 10% | 25% | 50% | 75% | |||
|
| |||||||
| Sensitivity | Specificity | Probability of having disease given a positive test | |||||
| C6 peptide ELISA | 53.9% | 92.1% | 26.4% | 43.1% | 69.4% | 87.2% | 95.3% |
| ELISA | 62.3% | 96.8% | 50.6% | 68.4% | 86.6% | 95.1% | 98.3% |
| Western blot | 62.4% | 94.8% | 38.7% | 57.1% | 80.0% | 92.3% | 97.3% |
| 6 rapid HIV tests | 99.5% | 99.7% | 94.6% | 97.4% | 99.1% | 99.7% | 99.9% |
Abbreviation: ELISA, enzyme-linked immunosorbent assay.