Table 2.

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

NP swab	Saliva samples	N 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 (p = 0.006).