Tuberculosis suspected by the primary care physician | Tuberculosis diagnosed by the primary care physician | |
---|---|---|
True positives | 276 | 36 |
False positives | 240 | 462 |
False negatives | 89 | 4 |
True negatives | 787 | 867 |
Sensitivity % (95%CI) | 76 (71–79) | 90 (76–97) |
Specificity % (95%CI) | 77 (74–79) | 65 (63–68) |
Positive predictive value % (95%CI) | 53 (49–58) | 7 (5–10) |
Negative predictive value % (95%CI) | 90 (88–92) | 99.5 (98.8–99.8) |
Likelihood ratio for positive test | 3.2 | 2.6 |
Likelihood ratio for negative test | 0.31 | 0.15 |
Area under the ROC curve (95%CI) | 0.76 (0.74–0.79) | 0.78 (0.73–0.82) |