Table 6:
Impact of the observation method on the clinical performance for assessed self-collection techniques
| TN | SG | |||||
|---|---|---|---|---|---|---|
| SARS-CoV-2 positivity rate according to | Observed | Unobserved* | Observed | Unobserved* | ||
| (Number of positives/total) | p-value | (Number of positives/total) | p-value | |||
| SG | N.A. | N.A. | N.A. | 122/247 (49.39%) | 22/57 (38.60%) | 0.141 |
| TN | 69/145 (47.59%) | 75/161 (46.58%) | 0.861 | N.A. | N.A. | N.A. |
| FCIP | 72/149 (48.32%) | 79/162 (48.77%) | 0.938 | 128/252 (50.79%) | 23/59 (38.98%) | 0.102 |
Note: Buccal-bilateral nares collections are not captured in this table due to low sample sizes
*
There were 59 participants in the final week of the evaluation when both SG and TN were collected unobserved. After excluding one participant who provided no SG, one with an indeterminate SG, and 12 who collected an unobserved BN instead of a TN, there were 45 participants left. For those 45 participants, the positivity rate of SG was the same as TN (18/45 or 40%)
SG = saline gargle; TN = throat-bilateral nares; FCIP = final clinical test interpretation