Characteristic Total(n) Before the COVID-19 During the COVID-19
Total(n) 29926 12484 17442
Sex(male/female) 19125/10801 8050/4434 11075/6367
Age(mean±SD) 4.59±3.103 4.21±3.145 4.86±3.043
Age group
Infant(n) 8535 4444 3909
Preschool(n) 12388 4593 12388
School(n) 6566 2435 6566
Adolescence(n) 2619 1015 2619
Season
Spring (3-5) (n) 7660 3064 4596
Summer (6-8) (n) 8122 3306 4816
Autumn (9-11) (n) 8154 3109 5045
Winter (12-2) (n) 5990 3005 2985
allergen(n)
d1 6107 2854 3253
d2 4801 1990 2811
e2 21510 5063 16447
mx2 26334 9699 16635
sycamore 13645 1318 12327
e1 14460 1318 13142
w1 19904 3932 15972
elm 13647 1318 12329
w6 19656 4156 15500
i6 21593 5142 16451
w14 1592 1131 461
t70 1592 1131 461
u80 19898 3932 15966
f37 1592 1131 461