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. 2022 May 5;12:7355. doi: 10.1038/s41598-022-11284-8

Table 1.

Characteristics of study participants.

Characteristic Phase I
Healthcare worker collection
(N = 319)
Phase II
Self
Collection
(N = 210)
p

Age in years

(mean ± SD)

30.6 (10.9) 29.5 (10.3) 0.246

Sex

N (%)

Male 251 (78.7) 153 (48.0) 0.142
Female 68 (21.3) 57 (17.9)

Symptomatic

N (%)

Yes 109 (34.2) 63 (19.7) 0.343
No 210 (65.8) 147 (46.1)

Days since symptom onset

(mean ± SD)

2.4 ± 1.4 2.6 ± 1.5 0.380

COVID-19 vaccine

N (%)

Taken 45 (14.1) 33 (10.3) 0.618
Not taken 274 (85.9) 177 (55.5)