TABLE 1.
Laboratory performance for detection of HIV antibodies using a dual HIV-syphilis rapid immunodiagnostic test in Lima, Peru, in 2015 (n = 450)
| Chembio DPP test resulta | No. of samples |
Sensitivity (95% CI) (%) | Specificity (95% CI) (%) | Kappa coefficient (95% CI) | ||
|---|---|---|---|---|---|---|
| Western blot positive | Western blot negative | Total | ||||
| Visual interpretation | 100.0 (97.6–100.0) | 98.7 (96.6–99.6) | 0.98 (0.96–1.0) | |||
| Positive | 151 | 4 | 155 | |||
| Negative | 0 | 295 | 295 | |||
| Total | 151 | 299 | 450 | |||
| Electronic reader (cutoff value of 10) | 100.0 (97.6–100.0) | 98.7 (96.6–99.6) | 0.98 (0.96–1.00) | |||
| Positive | 151 | 4 | 155 | |||
| Negative | 0 | 295 | 295 | |||
| Total | 151 | 299 | 450 | |||
a
DPP, dual-path platform; CI, confidence interval.