Test Characteristics of a Positive or Equivocal C6 EIA Result for the Diagnosis of Lyme Arthritis
| . | Lyme Arthritis, N = 211 . | Septic Arthritis, N = 11 . | Inflammatory Arthritis, N = 689 . |
|---|---|---|---|
| Positive or equivocal C6 EIA result | 211 | 0 | 39 |
| Negative C6 EIA result | 0 | 11 | 650 |
| Test performance | |||
| Sensitivity | 211 out of 211 (100%; 95% CI: 98.2%–100%) | ||
| Specificity | 661 out of 700 (94.4%; 95% CI: 92.5%–95.9%) | ||
| Negative predictive value | 661 out of 661 (100%; 95% CI: 99.4%–100%) | ||
| Positive predictive value | 211 out of 250 (84.4%; 95% CI: 79.4%–88.4%) | ||
| Positive likelihood ratio | 17.95 (95% CI: 13.23–24.35) | ||
| . | Lyme Arthritis, N = 211 . | Septic Arthritis, N = 11 . | Inflammatory Arthritis, N = 689 . |
|---|---|---|---|
| Positive or equivocal C6 EIA result | 211 | 0 | 39 |
| Negative C6 EIA result | 0 | 11 | 650 |
| Test performance | |||
| Sensitivity | 211 out of 211 (100%; 95% CI: 98.2%–100%) | ||
| Specificity | 661 out of 700 (94.4%; 95% CI: 92.5%–95.9%) | ||
| Negative predictive value | 661 out of 661 (100%; 95% CI: 99.4%–100%) | ||
| Positive predictive value | 211 out of 250 (84.4%; 95% CI: 79.4%–88.4%) | ||
| Positive likelihood ratio | 17.95 (95% CI: 13.23–24.35) | ||