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PPA of the Accula SARS-CoV-2 PCR test compared to the SHC-LDT for SARS-CoV-2, stratified by CT values and transport medium type
| CT value | PPA [% (no. positive/total no.) |
||
|---|---|---|---|
| Saline | VTM | Overall | |
| <30 | 100 (11/11) | 100 (16/16) | 100 (27/27) |
| 30–35 | 50.0 (3/6) | 100 (3/3) | 66.7 (6/9) |
| >35 | 8.3 (1/12) | 0 (0/2) | 7.1 (1/14) |
| Total | 51.7 (15/29) | 90.5 (19/21) | 68.0 (34/50) |
