Table 5.

Hayat genetics RT-LAMP sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) and efficiency (A).

Cut-off (mins)
Parameter	20	21	22	23
(A)
Sensitivity	95.3	96.0	98.7	99.3
Specificity	99.6	98.4	97.6	95.2
PPV	99.3	97.3	96.1	92.5
NPV	97.3	97.6	99.2	99.6
Efficiency	98.0	97.5	98.0	96.7
(B)
Sensitivity	95.3	96.0	98.7	99.3
Lower 95%	90.7	91.5	95.3	96.3
Upper 95%	97.7	98.2	99.6	99.9
Specificity	99.6	98.4	97.6	95.2
Lower 95%	97.8	95.9	94.8	91.8
Upper 95%	99.9	99.4	98.9	97.2

Four different TTT cut-off times were used for comparison with RT-PCR results. Sensitivity and specificity with 95% confidence limits (B).