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. 2021 Jun 10;9(6):638. doi: 10.3390/vaccines9060638

Table 1.

Sample characteristics.

Variable Participants
n = 3226
Age, years
Mean ± SD 23.3 ± 3.9
Range 18–45
Median value 22
Interquartile range 21–25
Gender, n (%)
Male 1421 (44)
Female 1805 (56)
Father‘s educational level, n (%)
Elementary/middle school 846 (26.2)
High school 1596 (49.5)
Degree/post-degree 784 (24.3)
Mother‘s educational level, n (%)
Elementary/middle school 755 (23.4)
High school 1603 (49.7)
Degree/post-degree 868 (26.9)
Area of study, n (%)
Life science 1787 (55.4)
Other 1439 (44.6)
Healthcare worker, n (%)
Yes 264 (8.2)
No 2962 (91.8)
COVID-19 infection, n (%)
Yes 299 (9.3)
Asymptomatic 72 (24.1)
Symptomatic 219 (73.2)
Severe 8 (2.7)
No 2927 (90.7)
COVID-19 infection in relative, n (%)
Yes 947 (29.4)
Asymptomatic 143 (15.1)
Symptomatic 602 (63.6)
Severe 132 (13.9)
Dead 70 (7.4)
No 2279 (70.6)