Clinical performance of oral sponges (OS) compared to nasopharyngeal swabs (NP) for SARS-CoV-2 screening (LPCE, Idylla platform)
| NP + OS + | NP + OS − | NP − OS + | NP − OS − | Total | Concordance % | Sensitivity of NP % | Sensitivity of OS % | |
| a | b | c | d | n=a+b+c+d | (a+d)/n (95% CI) | (a+b)/(a+b+c) (95% CI) | (a+c)/(a+b+c) (95% CI) | |
| Symptomatic subjects | 54 | 4 | 1 | 88 | 147 | 96.5 (93.5–99.5) | 98.3% (96.2–100) | 93.2# (89.1–97.3) |
| Close contact subjects | 41 | 16 | 0 | 205 | 262 | 93.8 (90.9–96.7) | 100 | 71.9 (66.5–77.3) |
#: the 16.9% difference in OS sensitivity between the Idylla and the Synlab Barla laboratory platforms was statistically significant.