Validation of a Saliva-Based Test for the Molecular Diagnosis of SARS-CoV-2 Infection

Table 2

Relationship between test agreement and onset of symptoms before test (days).

NP swab	Saliva samples	of observations	Days of symptoms before test, median (IQR)
Negative	Negative	38	14 (12-17)
Negative	Positive	20	15.5 (11.5-18)
Positive	Negative	5	13 (13-13)
Positive	Positive	89	11 (8-14)

Comparison between group with both positive saliva and swab concordant test (both positive or both negative) showed statistically significant difference in terms of days of symptoms before test ().