Table 2 A comparison of the diagnostic tools RDT, microscopy and PCR; and test of their accuracy
RDT/PCR | Microscopy/PCR | RDT/microscopy | |
|---|---|---|---|
Neg | 352/339 | 345/339 | 352/345 |
Pos | 49/62 | 56/62 | 49/56 |
p value* | < 0.05 | < 0.05 | < 0.05 |
Kappa co-efficient | 0.83 |
RDT | Under 5 years (n = 150) | Under 5 years (n = 251) | |
|---|---|---|---|
HIV positive (95% CI) | HIV negative (95% CI) | ||
Sensitivity | 83 (53.5–100) | 78.6 (67.8–89.3) | |
Specificity | 100 (98.9–100) | 100 (99.1–100) | |
Positive predictive value | 100 (97.8–100) | 100 (99.3–100) | |
Negative predictive value | 99 (98–100) | 94.2 (91–97.4) |
Microscopy | Under 5 years (n = 150) | Under 5 years (n = 251) | |
|---|---|---|---|
HIV positive (95% CI) | HIV negative (95% CI) | ||
Sensitivity (CI) | 100 (99–100) | 89.3 (81.2–97.4) | |
Specificity (CI) | 100 (98.5–100) | 100 (99.3–100) | |
Positive predictive value | 100 (99.2–100) | 100 (99–100) | |
Negative predictive value | 100 (99.6–100) | 97 (94.7–99.4) |