Table 5.
Accuracy measures of biotin Streptavidin (BS) strip using PCR as a reference test in health care worker groups.
| Day | PCR (−) strip (−) |
PCR (+) strip (+) |
PPV (%) | NPV (%) | Accuracy (%) | Sensitivity (%) | Specificity (%) | kappa | Kappa SE | P-value | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| High risk group (n = 25) | 4 | 16/17 | 9/8 | 100.00 | 94.10 | 96.0 | 88.9 | 100.00 | 0.911 | 0.087 | 0.000 |
| 6 | 14/15 | 11/10 | 100.00 | 93.30 | 96.0 | 90.9 | 100.00 | 0.918 | 0.08 | 0.000 | |
| Paramedic group (n = 20) | 4 | 17/18 | 3/2 | 100.00 | 94.40 | 95.0 | 66.7 | 100.00 | 0.773 | 0.216 | 0.000 |
| 6 | 15/16 | 5/4 | 100.00 | 93.80 | 95.0 | 80.0 | 100.00 | 0.857 | 0.138 | 0.000 |
PPV, positive predictive value; NPV, negative predictive value.
P < 0.00 and P < 0.000: represent significant agreement.