Table 3.
Concordance between the results of SARS-CoV-2 antigen and nucleic acid tests by each cut-off value.
|
a | ||||
| 2019 Novel Coronavirus Detection Kit |
Total |
|||
| (+) |
(-) |
|||
| Lumipulse Presto SARS-CoV-2 Ag ((+)≥1.34 pg/mL) |
(+) |
55 |
13 |
68 |
| (-) |
19 |
13 |
32 |
|
| Total | 74 | 26 | 100 | |
| Sensitivity: 74.3% (95% confidence interval: 64.0%–83.6%) Concordance rate: 68.0% | ||||
|
b | ||||
| 2019 Novel Coronavirus Detection Kit |
Total |
|||
| (+) |
(-) |
|||
| Lumipulse Presto SARS-CoV-2 Ag ((+)≥1.34 pg/mL) |
(+) |
0 |
4 |
4 |
| (-) |
0 |
196 |
196 |
|
| Total | 0 | 200 | 200 | |
| Specificity: 98.0% (95% confidence interval: 95.0%–100.0%) Concordance rate: 98.0% | ||||
|
c | ||||
| 2019 Novel Coronavirus Detection Kit |
Total |
|||
| (+) |
(-) |
|||
| Lumipulse Presto SARS-CoV-2 Ag ((+)≧0.97 pg/mL) |
(+) |
56 |
16 |
72 |
| (-) |
18 |
10 |
28 |
|
| Total | 74 | 26 | 100 | |
| Sensitivity: 75.7% (95% confidence interval: 65.5%–85.9%) Concordance rate: 66.0% | ||||
|
d | ||||
| 2019 Novel Coronavirus Detection Kit |
Total |
|||
| (+) |
(-) |
|||
| Lumipulse Presto SARS-CoV-2 Ag ((+)≧0.97 pg/mL) |
(+) |
0 |
10 |
10 |
| (-) |
0 |
190 |
190 |
|
| Total | 0 | 200 | 200 | |
| Specificity: 95.0% (95% confidence interval: 92.5%–97.5%) Concordance rate : 95.0% When 1.34 pg/mL was set as the cut-off value in the positive (3a) and negative groups (3b) When 0.97 pg/mL was set as the cut-off value in the positive (3c) and negative groups (3d) | ||||