Table 1 Diagnostic agreement contingency table and estimates comparing SE and SalivaDirect RT-qPCR, as separate index tests, to NOS RT-qPCR for SARS-CoV-2 detection.

From: Saliva as alternative to naso-oropharyngeal swab for SARS-CoV-2 detection by RT-qPCR: a multicenter cross-sectional diagnostic validation study

NOS RT-qPCR

SE RT-qPCR

TOTAL

Positive

Negative

SalivaDirect RT-qPCR

SalivaDirect RT-qPCR

Positive

Negative

Positive

Negative

Positive

135

4

2

9

150

Negative

3

6

1

357

367

Total

138

10

3

366

517

  1. NOS naso-oropharyngeal swab, RT-qPCR reverse transcription quantitative/real-time polymerase chain reaction, SE saliva with RNA extraction.
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