Features
|
Subgroup
|
RT-qPCR test
|
RT-qPCR test
|
Sensitivity% (CI*)
|
Specificity% (CI)
|
Accuracy%
|
Likelihood ratio
|
|
Standard ™ Q COVID-19 Ag test | Positive | Negative | ||||||
Gender
|
Male (n = 49) |
Positive
|
32
|
4
|
76.1 (0.61-0.86)
|
42.8 (0.27-0.64)
|
71.4
|
1.33
|
Negative | 10 | 3 | ||||||
Female (n = 34) |
Positive
|
22
|
1
|
78.5 (0.60-0.89)
|
83.3 (0.15-0.74)
|
79.4
|
4.71
|
|
Negative | 5 | 5 | ||||||
Symptomatology (total n = 47) | Symptomatic (n = 42) |
Positive
|
32
|
0
|
76.1 (0.63-0.88)
|
NA
|
76.1
|
NA
|
Negative | 10 | 0 | ||||||
Asymptomatic (n = 5) |
Positive
|
2
|
1
|
66.6 (0.61-0.98)
|
50 (0-0.94)
|
60
|
0.66
|
|
Negative | 1 | 1 | ||||||
Radiology (total n = 44) | With findings (n = 37) |
Positive
|
28
|
1
|
75.6 (0.59-0.86)
|
0 (0-0.94)
|
73.6
|
0.75
|
Negative | 9 | 0 | ||||||
No findings (n = 7) |
Positive
|
6
|
1
|
85.7 (0.48-0.95)
|
0 (0-1)
|
75
|
0.75
|
|
Negative | 2 | 0 | ||||||
Days post symptom onset (total n = 69) * |
0-7 (n = 38)
|
Positive
|
31
|
1
|
83.7 (0.68-0.92)
|
0 (0-0.94)
|
81.5
|
0.83
|
Negative | 6 | 0 | ||||||
8-16 (n = 27) | Positive | 19 | 0 | 70 (0.51-0.84) | NA | 70.3 | NA | |
Negative | 8 | 0 | ||||||
>16 (n = 4) | Positive | 2 | 1 | 66.6 (0.11-0.98) | 0 (0-0.94) | 50 | 0.66 | |
Negative | 1 | 0 |